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Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jul. 31, 2018	Sep. 05, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jul. 31, 2018
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	MIND
Entity Registrant Name	MITCHAM INDUSTRIES INC
Entity Central Index Key	0000926423
Current Fiscal Year End Date	--01-31
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		12,119,399

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018
Current assets:
Cash and cash equivalents	$ 6,886	$ 9,902
Restricted cash	223	244
Accounts and contracts receivable, net of allowance for doubtful accounts of $3,115 and $3,885 at July 31, 2018 and January 31, 2018, respectively	11,498	10,494
Inventories, net	11,855	10,856
Prepaid expenses and other current assets	1,970	1,550
Total current assets	32,432	33,046
Seismic equipment lease pool and property and equipment, net	19,765	22,900
Intangible assets, net	11,037	8,015
Goodwill	2,531	2,531
Non-current prepaid income taxes	1,570	1,609
Long-term receivables, net of allowance for doubtful accounts of $532 and $2,282 at July 31, 2018 and January 31, 2018, respectively	168	4,652
Other assets	611	926
Total assets	68,114	73,679
Current liabilities:
Accounts payable	2,038	1,271
Deferred revenue	460	741
Accrued expenses and other current liabilities	4,776	5,253
Income taxes payable	886	258
Total current liabilities	8,160	7,523
Deferred tax liability	0	307
Total liabilities	8,160	7,830
Shareholders’ equity:
Preferred stock, $1.00 par value; 1,000 shares authorized; 768 and 532 issued and outstanding at July 31, 2018 and January 31, 2018, respectively	16,950	11,544
Common stock, $0.01 par value; 20,000 shares authorized; 14,049 and 14,019 shares issued at July 31, 2018 and January 31, 2018, respectively	140	140
Additional paid-in capital	122,672	122,304
Treasury stock, at cost (1,929 shares at July 31, 2018 and January 31, 2018)	(16,860)	(16,860)
Accumulated deficit	(53,715)	(42,425)
Accumulated other comprehensive loss	(9,233)	(8,854)
Total shareholders’ equity	59,954	65,849
Total liabilities and shareholders’ equity	$ 68,114	$ 73,679

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 3,115	$ 3,885
Allowance for doubtful accounts	$ 532	$ 2,282
Preferred stock, par value (in usd per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	768,000	532,000
Preferred stock, shares outstanding (in shares)	768,000	532,000
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	14,049,000	14,019,000
Treasury stock, shares (in shares)	1,929,000	1,929,000

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Revenues:
Sale of marine technology products	$ 5,877	$ 9,586	$ 9,443	$ 16,474
Equipment leasing	1,630	977	4,327	3,694
Sale of lease pool equipment	843	273	2,193	9,101
Total revenues	8,350	10,836	15,963	29,269
Cost of sales:
Sale of marine technology products	3,216	5,868	5,302	9,843
Equipment leasing (including lease pool depreciation of $2,445 and $3,750 for the three months ended July 31, 2018 and 2017 respectively, and $5,099 and $7,931 for the six months ended July 31, 2018 and 2017 respectively)	3,242	4,290	6,824	9,415
Lease pool equipment sales	32	60	732	6,199
Total cost of sales	6,490	10,218	12,858	25,457
Gross profit	1,860	618	3,105	3,812
Operating expenses:
Selling, general and administrative	5,504	4,825	11,134	9,629
Research and development	312	240	682	338
Provision for doubtful accounts	0	0	200	0
Depreciation and amortization	620	525	1,237	1,106
Total operating expenses	6,436	5,590	13,253	11,073
Operating loss	(4,576)	(4,972)	(10,148)	(7,261)
Other income (expense):
Interest income (expense), net	17	17	35	(29)
Other, net	55	(52)	141	(153)
Total other income (expense)	72	(35)	176	(182)
Loss before income taxes	(4,504)	(5,007)	(9,972)	(7,443)
Provision for income taxes	(85)	(357)	(522)	(586)
Net loss	(4,589)	(5,364)	(10,494)	(8,029)
Preferred stock dividends	(411)	(207)	(796)	(401)
Net loss attributable to common shareholders	$ (5,000)	$ (5,571)	$ (11,290)	$ (8,430)
Net loss per common share:
Basic (in usd per share)	$ (0.41)	$ (0.46)	$ (0.93)	$ (0.70)
Diluted (in usd per share)	$ (0.41)	$ (0.46)	$ (0.93)	$ (0.70)
Shares used in computing net loss per common share:
Basic (in shares)	12,093	12,082	12,090	12,080
Diluted (in shares)	12,093	12,082	12,090	12,080

Condensed Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Income Statement [Abstract]
Lease pool depreciation	$ 2,445	$ 3,750	$ 5,099	$ 7,931

Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Statement of Comprehensive Income [Abstract]
Net loss available to common shareholders	$ (5,000)	$ (5,571)	$ (11,290)	$ (8,430)
Change in cumulative translation adjustment	(142)	846	(379)	875
Comprehensive loss attributable to common shareholders	$ (5,142)	$ (4,725)	$ (11,669)	$ (7,555)

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017
Cash flows from operating activities:
Net loss	$ (10,494)	$ (8,029)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	6,399	9,095
Stock-based compensation	368	461
Provision for inventory obsolescence	115	67
Provision for doubtful accounts, net of charge offs	200	0
Gross profit from sale of lease pool equipment	(1,246)	(2,852)
Deferred tax expense	(306)	(57)
Changes in:
Trade accounts and contracts receivable	2,227	5,877
Unbilled revenue	(341)	0
Inventories	(1,406)	(107)
Prepaid expenses and other current assets	(1,435)	201
Income taxes receivable and payable	665	430
Accounts payable, accrued expenses and other current liabilities	(1,551)	(929)
Deferred revenue	942	0
Foreign exchange losses net of gains	64	(71)
Net cash (used in) provided by operating activities	(5,799)	4,086
Cash flows from investing activities:
Purchases of seismic equipment held for lease	(1,386)	(234)
Acquisition of assets	(3,000)	0
Purchases of property and equipment	(487)	(128)
Sale of used lease pool equipment	2,792	6,020
Net cash (used in) provided by investing activities	(2,081)	5,658
Cash flows from financing activities:
Net payments on revolving line of credit	0	(3,500)
Payments on term loan and other borrowings	0	(2,807)
Net proceeds from preferred stock offering	5,450	774
Preferred stock dividends	(796)	(401)
Net cash provided by (used in) financing activities	4,654	(5,934)
Effect of changes in foreign exchange rates on cash, cash equivalents and restricted cash	189	(169)
Net (decrease) increase in cash, cash equivalents and restricted cash	(3,037)	3,641
Cash, cash equivalents and restricted cash, beginning of period	10,146	3,511
Cash, cash equivalents and restricted cash, end of period	7,109	7,152
Supplemental cash flow information:
Interest paid	2	120
Income taxes paid	268	159
Purchases of seismic equipment held for lease in accounts payable at end of period	$ 264	$ 42

Organization	6 Months Ended
Organization	Jul. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization Mitcham Industries, Inc., a Texas corporation (the “Company”), was incorporated in 1987. The Company, through its wholly owned subsidiary, Seamap International Holdings Pte, Ltd. (“Seamap”), and its wholly owned subsidiary, Klein Marine Systems, Inc. (“Klein”), designs, manufactures and sells a broad range of proprietary products for the seismic, hydrographic and offshore industries with product sales and support facilities based in New Hampshire, Singapore and the United Kingdom. The Company, through its wholly owned Australian subsidiary, Seismic Asia Pacific Pty Ltd. (“SAP”), provides seismic, oceanographic and hydrographic leasing and sales worldwide, primarily in Southeast Asia and Australia. The Company, through its wholly owned Canadian subsidiary, Mitcham Canada, ULC (“MCL”), its wholly owned Russian subsidiary, Mitcham Seismic Eurasia LLC (“MSE”), its wholly owned Hungarian subsidiary, Mitcham Europe Ltd. (“MEL”), its wholly owned Singaporean subsidiary, Mitcham Marine Leasing Pte. Ltd. (“MML”), and its branch operations in Colombia, provides full-service equipment leasing, sales and service to the seismic industry worldwide. All intercompany transactions and balances have been eliminated in consolidation.

Basis of Presentation	6 Months Ended
Basis of Presentation	Jul. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The condensed consolidated balance sheet as of January 31, 2018 for the Company has been derived from audited consolidated financial statements. The unaudited interim condensed consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States have been condensed or omitted pursuant to such rules and regulations, although the Company believes that the disclosures are adequate to make the information presented not misleading. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the related notes included in the Company’s Annual Report on Form 10-K for the year ended January 31, 2018. In the opinion of the Company’s management, all adjustments, consisting only of normal recurring adjustments, necessary to present fairly the financial position as of July 31, 2018, the results of operations for the three and six months ended July 31, 2018 and 2017, and the cash flows for the six months ended July 31, 2018 and 2017, have been included in these condensed consolidated financial statements. The foregoing interim results are not necessarily indicative of the results of operations to be expected for the full fiscal year ending January 31, 2019.

New Accounting Pronouncements	6 Months Ended
New Accounting Pronouncements	Jul. 31, 2018
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements In January 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment, to simplify impairment testing of goodwill and other intangible assets by eliminating step two of the impairment test. The Company has adopted the provisions of ASU 2017-04 as of January 31, 2018. The adoption of ASU 2017-04 did not have a material effect on the Company's condensed consolidated financial statements. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, to address how certain cash receipts and cash payments are presented and classified in the statement of cash flows. This update addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. The Company has adopted the provisions of ASU No. 2016-15 as of February 1, 2018. The adoption of ASU No. 2016-15 did not have a material effect on the Company’s condensed consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842), to provide guidance on recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements, specifically differentiating between different types of leases. More specifically, the new guidance requires a lessee to recognize assets and liabilities for leases with terms of more than 12 months. ASU No. 2016-02 will be effective during the Company’s fiscal year ended January 31, 2020. Management has not yet completed its assessment of the impact of the new guidance. However, based on a preliminary review, the Company does not expect the adoption of ASU No. 2016-02 to have a material impact on its financial statements. The Company is continuing its assessment, which may identify additional impacts the adoption of ASU No. 2016-02 will have on its consolidated financial statements and disclosures. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which supersedes the revenue recognition requirements in ASC 605, Revenue Recognition. ASU 2014-09 was later amended by ASU No. 2016-10 Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing , and ASU No. 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients . ASU 2014-09, as amended, (the “New Revenue Standard”) supersedes most industry specific guidance and intends to enhance comparability of revenue recognition practices across entities and industries by providing a principle-based, comprehensive framework for addressing revenue recognition issues. The Company adopted the New Revenue Standard as of February 1, 2018 using the modified retrospective method. The adoption of the New Revenue Standard did not have a material impact on the Company’s consolidated financial statements.

Revenue from Contracts with Customers

6 Months Ended

Jul. 31, 2018

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

Effective February 1, 2018 the Company adopted the New Revenue Standard using the modified retrospective method applied to those contracts which were not completed as of February 1, 2018. Results for reporting periods beginning after January 31, 2018 are presented under Topic 606, while prior period amounts are not adjusted and continue to be reported in accordance with our historic accounting under Topic 605.

Under the New Revenue Standard, revenues are recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. The Company has determined that the New Revenue Standard applies to contracts performed by the businesses in our Marine Technology Products segment, but not to contracts performed by our Equipment Leasing segment which are within the scope of other revenue recognition standards.

The impact of adopting the New Revenue Standard was not material, as the analysis of our contracts under the New Revenue Standard supports the recognition of revenue at a point in time for the majority of our contracts, which is consistent with our revenue recognition model. As a result, the Company did not record an adjustment to opening retained earnings as a result of the adoption of the New Revenue Standard.

The following table presents revenue from contracts with customers disaggregated by product line and timing of revenue recognition (in thousands):



	Three Months Ended July 31, 2018		Six Months Ended July 31, 2018
Revenue recognized at a point in time:	(in thousands)
Seamap	$	3,611	$	5,156
Klein	1,401		2,877
SAP	797		1,277
Total revenue recognized at a point in time	$	5,809	$	9,310
Revenue recognized over time:
Seamap	$	203	$	410
Total revenue recognized over time	203		410
Total revenue from contracts with customers	$	6,012	$	9,720

The revenue from products manufactured and sold by our Seamap and Klein businesses, as well as the revenue from products marketed and sold by our SAP business, is generally recognized at a point in time, or when the customer takes possession of the product, based on the terms and conditions stipulated in our contracts with customers. Our Seamap business also provides Software Maintenance Agreements (“SMA”) to customers who have an active license for software imbedded in Seamap products. The revenue from SMA’s is recognized over time, with the total value of the SMA amortized in equal monthly amounts over the life of the contract.

The following table presents revenue from contracts with customers disaggregated by geography, based on shipping location of our customers (in thousands):



	Three Months Ended July 31, 2018		Six Months Ended July 31, 2018
	(in thousands)
United States	$	1,124	$	1,252
Europe, Russia & CIS	2,747		4,766
Middle East & Africa	122		636
Asia-Pacific	1,979		2,679
Canada & Latin America	40		387
Total revenue from contracts with customers	$	6,012	$	9,720

As of July 31, 2018 contract assets and liabilities consisted of the following (in thousands):



	July 31, 2018
Contract Assets:	(in thousands)
Unbilled revenue-current	$	341
Unbilled revenue - non-current	—
Total unbilled revenue	$	341
Contract Liabilities:
Deferred revenue & customer deposits - current	$	934
Deferred revenue & customer deposits - non-current	8
Total deferred revenue & customer deposits	$	942

Considering the products manufactured and sold by the businesses in our Marine Technology Products segment and the Company’s standard contract terms and conditions, we expect our contract assets and liabilities to turn over, on average, within a three to six month period.

Pursuant to practical expedients and exemptions included in the New Revenue Standard, sales and transaction-based taxes are excluded from revenue. Also, we do not disclose the value of unsatisfied performance obligations for contacts with an original expected duration of one year or less. Additionally, we expense costs incurred to obtain contracts when incurred because the amortization period would have been one year or less. These costs are recorded in selling, general and administrative expenses.

Acquisition of Assets

6 Months Ended

Jul. 31, 2018

Business Combinations [Abstract]

Acquisition of Assets

In February 2018 the Company completed the acquisition of intellectual property and certain other assets from Hydroscience Technologies, Inc. and Solid Seismic LLC (collectively “Hydroscience”). Hydroscience designed, manufactured and sold marine sensors and solid streamer technology products primarily for the hydrographic and seismic industries. In April 2017 Hydroscience filed for bankruptcy protection. Mitcham acquired the assets pursuant to an Asset Purchase Agreement and Sale Order (collectively the “Agreement”) that were approved by the bankruptcy court on January 31, 2018. Under the terms of the Agreement, Mitcham acquired certain specified intangible and tangible assets free and clear of all prior claims and encumbrances, and assumed no liabilities, contracts or prior warranty obligations. Details of the purchase price and the allocation of the purchase price to the assets acquired are as follows (in thousands):




Purchase Price:
Cash	$	3,000
Release of claims against Hydroscience	1,144
Transaction costs	312
Total purchase price	$	4,456

Allocation of purchase price:
Inventory	$	206
Tangible assets (mainly manufacturing equipment)	350
Intangible assets (including patents, designs & software)	3,900
Total purchase price	$	4,456

The cash portion of the purchase price was financed with the sale of 152,290 shares of our Series A Cumulative Preferred Stock (see Note 10) to Mitsubishi Heavy Industries, Inc. for $3.5 million.

Balance Sheet

6 Months Ended

Jul. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Balance Sheet



	July 31, 2018			January 31, 2018
	(in thousands)
Receivables:
Accounts receivable	$	11,490		$	16,392
Contracts receivable	3,823			4,921
	15,313			21,313
Less long-term portion	(700		)	(6,934		)
Current accounts and contracts receivable	14,613			14,379
Less current portion of allowance for doubtful accounts	(3,115		)	(3,885		)
Current portion of accounts and contracts receivable, net of allowance for doubtful accounts	$	11,498		$	10,494

Contracts receivable consisted of $3.8 million due from four customers at July 31, 2018 and $4.9 million due from four customers as of January 31, 2018. The balance of contracts receivable at July 31, 2018 and January 31, 2018 consisted of contracts bearing interest at an average rate of approximately 2.7% and 2.2% respectively and with remaining repayment terms from 1 to 40 months. These contracts are related to lease pool equipment sales and are collateralized by the equipment sold.



	July 31, 2018			January 31, 2018
	(in thousands)
Inventories:
Raw materials	$	4,842		$	5,099
Finished goods	6,138			6,185
Work in progress	1,929			1,247
	12,909			12,531
Less allowance for obsolescence	(1,054		)	(1,675		)
Total inventories, net	$	11,855		$	10,856



	July 31, 2018			January 31, 2018
	(in thousands)
Seismic equipment lease pool and property and equipment:
Seismic equipment lease pool	$	168,646		$	174,274
Land and buildings	3,381			3,380
Furniture and fixtures	11,166			10,222
Autos and trucks	778			722
	183,971			188,598
Accumulated depreciation and amortization	(164,206		)	(165,698		)
Total seismic equipment lease pool and property and equipment, net	$	19,765		$	22,900

As of January 31, 2018, the Company completed an annual review of long-lived assets noting that the undiscounted future cash flows exceeded their carrying value and no impairment has been recorded. Since January 31, 2018 there have been no significant changes to the market, economic or legal environment in which the Company operates that would indicate additional impairment analysis is necessary as of July 31, 2018.

Goodwill and Other Intangible Assets

6 Months Ended

Jul. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets



	Weighted Average Life at 7/31/2018	July 31, 2018										January 31, 2018
	Weighted Average Life at 7/31/2018	Gross Carrying Amount		Accumulated Amortization			Impairment			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Impairment			Net Carrying Amount
				(in thousands)										(in thousands)
Goodwill		$	7,060	$	—		$	(4,529	)	$	2,531	$	7,060	$	—		$	(4,529	)	$	2,531
Proprietary rights	7.9	$	9,286	$	(3,915	)	$	—		$	5,371	$	6,181	$	(3,663	)	$	—		$	2,518
Customer relationships	3.3	5,024		(2,805		)	—			2,219		5,024		(2,464		)	—			2,560
Patents	5.9	2,441		(903		)	—			1,538		1,730		(778		)	—			952
Trade name	7.8	894		(46		)	—			848		894		(41		)	—			853
Developed technology	7.4	1,430		(369		)	—			1,061		1,430		(298		)	—			1,132
Amortizable intangible assets		$	19,075	$	(8,038	)	$	—		$	11,037	$	15,259	$	(7,244	)	$	—		$	8,015

On January 31, 2018, the Company completed an annual review of goodwill and other intangible assets. Based on a review of qualitative factors it was determined it was more likely than not that the fair value of our Seamap reporting unit was greater than its carrying value. Based on a review of qualitative and quantitative factors it was determined it was more likely than not that the fair value of our Klein reporting unit was not greater than its carrying value. Accordingly, we recorded an impairment of approximately $1.5 million related to the Klein reporting unit in the quarter ended January 31, 2018.

During the six months ended July 31, 2018 there have been no substantive indicators of additional impairment.

Amortizable intangible assets are amortized over their estimated useful lives of five to 15 years using the straight-line method. Aggregate amortization expense was $889,000 and $716,000 for the six months ended July 31, 2018 and 2017, respectively. As of July 31, 2018, future estimated amortization expense related to amortizable intangible assets was estimated to be:



For fiscal years ending January 31 (in thousands):
2019	$	902
2020	1,783
2021	1,636
2022	1,150
2023	964
2024 and thereafter	4,602
Total	$	11,037

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Income Taxes	6 Months Ended
Income Taxes	Jul. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the six months ended July 31, 2018 the provision for income taxes was approximately $522,000 on a pre-tax net loss of $10.0 million, or an effective tax rate of -5.2%. For the six months ended July 31, 2017 the provision for income taxes was approximately $586,000 on a pre-tax net loss of $7.4 million, or an effective tax rate of -7.9%. The variance between our effective rate and the U.S. statutory rate is due to the mix of pre-tax profit between the U.S. and international taxing jurisdictions with varying statutory rates, the impact of permanent differences, state income and foreign withholding taxes, other tax adjustments, such as valuation allowances against deferred tax assets, and discrete items, including tax expense or benefit recognized for uncertain tax positions. Non-current prepaid income taxes of approximately $1.6 million at July 31, 2018 and at January 31, 2018, consist primarily of foreign taxes. The Company files U.S. federal and state income tax returns as well as separate returns for its foreign subsidiaries within their local jurisdictions. The Company's U.S. federal and state income tax returns are subject to examination by the Internal Revenue Service and state tax authorities for fiscal years ended January 31, 2013 through 2018. In addition, the Company's tax returns filed in foreign jurisdictions are generally subject to examination for the fiscal years ended January 31, 2013 through 2018. The Company has determined that the undistributed earnings of foreign subsidiaries are not deemed to be indefinitely reinvested outside of the United States as of July 31, 2018. Furthermore, the Company has concluded that any deferred taxes with respect to the undistributed foreign earnings would be immaterial, particularly in light of the one-time repatriation of foreign earnings imposed by the Tax Cuts and Jobs Act legislation enacted in December 2017. Therefore, the Company has not recorded a deferred tax liability associated with the undistributed foreign earnings as of July 31, 2018. For the six months ended July 31, 2018 and July 31, 2017, the Company did not recognize any tax expense or benefit related to uncertain tax positions. The Company prospectively adopted the provisions of ASU 2016-09 beginning February 1, 2017. Accordingly, all excess tax benefits or deficiencies related to employee share-based payments are recognized as income tax benefits or expense in the accompanying Consolidated Statement of Operations and as operating activities in the accompanying Consolidated Statements of Cash Flows.

Earnings per Share

6 Months Ended

Jul. 31, 2018

Earnings Per Share [Abstract]

Earnings per Share

Net income per basic common share is computed using the weighted average number of common shares outstanding during the period, excluding unvested restricted stock. Net income per diluted common share is computed using the weighted average number of common shares and dilutive potential common shares outstanding during the period using the treasury stock method. Potential common shares result from the assumed exercise of outstanding common stock options having a dilutive effect and from the assumed vesting of unvested shares of restricted stock.

The following table presents the calculation of basic and diluted weighted average common shares used in the earnings per share calculation:



	Three Months Ended July 31,		Six Months Ended July 31,
	2018	2017	2018	2017
	(in thousands)		(in thousands)
Basic weighted average common shares outstanding	12,093	12,082	12,090	12,080
Stock options	84	83	63	104
Unvested restricted stock	3	35	15	37
Total weighted average common share equivalents	87	118	78	141
Diluted weighted average common shares outstanding	12,180	12,200	12,168	12,221

For the three and six month periods ended July 31, 2018 and 2017, potentially dilutive common shares, underlying stock options and unvested restricted stock were anti-dilutive and were therefore not considered in calculating diluted loss per share for those periods.

Related Party Transaction	6 Months Ended
Related Party Transaction	Jul. 31, 2018
Related Party Transactions [Abstract]
Related Party Transaction	Related Party Transaction On October 7, 2016 the Company entered into an equity distribution agreement (the “Equity Distribution Agreement”) with Ladenburg Thalmann & Co. Inc. (the “Agent”), pursuant to which the Company may sell up to 500,000 shares of 9.00% Series A Cumulative Preferred Stock (the "Preferred Stock'), par value $1.00 per share through the Agent through an at-the-market ("ATM") offering program. The Co-Chief Executive Officer and Co-President of Ladenburg Thalmann & Co. Inc is the Non-Executive Chairman of the Company’s board of directors. Under the Equity Distribution Agreement, the Agent will be entitled to compensation of up to 2.0% of the gross proceeds from the sale of Preferred Stock under the ATM program. For the three and six month periods ended July 31, 2018, the Company issued 48,635 and 62,348 shares of Preferred Stock under the ATM offering program, respectively. Gross proceeds from these sales for the three and six months ended July 31, 2018 were approximately $1.2 million and $1.5 million, respectively, and the Agent received compensation of approximately $23,000 and $30,000, respectively. The Non-Executive Chairman of the Company received no portion of this compensation.

Equity and Stock-Based Compensation	6 Months Ended
Equity and Stock-Based Compensation	Jul. 31, 2018
Equity [Abstract]
Equity and Stock-Based Compensation	Equity and Stock-Based Compensation During the three months ended July 31, 2018, the Company’s Board of Directors declared quarterly dividends of $0.5625 per share for our Preferred Stock. See note 10 to our condensed consolidated financial statements. Total compensation expense recognized for stock-based awards granted under the Company’s equity incentive plan during the three and six month periods ended July 31, 2018 was approximately $242,000 and $368,000, respectively, and during the three and six month periods ended July 31, 2017 was approximately $237,000 and $461,000, respectively.

Subsequent Events	6 Months Ended
Subsequent Events	Jul. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In August 2018, the Company completed the sale of its wholly owned Russian subsidiary, Mitcham Seismic Eurasia LLC (“MSE”) for proceeds of approximately $1.0 million U.S. dollars. The proceeds approximate the book value of MSE’s net assets. As a result, management does not believe the transaction will have a material effect on the Company's results of operations.

Segment Reporting

6 Months Ended

Jul. 31, 2018

Segment Reporting [Abstract]

Segment Reporting

The Marine Technology Products segment is engaged in the design, manufacture and sale of state-of-the-art seismic and offshore

telemetry systems. Manufacturing, support and sales facilities are maintained in the UK, Singapore and New Hampshire, with sales offices in

Huntsville, Texas and Brisbane, Australia.

The Equipment Leasing segment offers for lease or sale, new and “experienced” seismic equipment to the oil and gas industry, seismic

contractors, environmental agencies, government agencies and universities. The Equipment Leasing segment is headquartered in Huntsville,

Texas, with sales and services offices in Calgary, Canada; Singapore; Brisbane, Australia and Ufa, Bashkortostan, Russia.

Financial information by business segment is set forth below (net of any allocations):



	As of July 31, 2018			As of January 31, 2018
	Total Assets			Total Assets
	(in thousands)
Marine Technology Products	$	43,228		$	35,879
Equipment Leasing	24,918			37,850
Eliminations	(32		)	(50		)
Consolidated	$	68,114		$	73,679

Results for the three months ended July 31, 2018 and 2017 were as follows (in thousands):



	Revenues						Operating income (loss)						Income (loss) before taxes
	2018			2017			2018			2017			2018			2017
Marine Technology Products	$	6,012		$	9,662		$	(1,016	)	$	850		$	(973	)	$	882
Equipment Leasing	2,473			1,271			(2,655		)	(4,988		)	(2,626		)	(5,041		)
Corporate expenses	—			—			(905		)	(834		)	(905		)	(834		)
Eliminations	(135		)	(97		)	—			—			—			(14		)
Consolidated	$	8,350		$	10,836		$	(4,576	)	$	(4,972	)	$	(4,504	)	$	(5,007	)

Results for the six months ended July 31, 2018 and 2017 were as follows (in thousands):



	Revenues						Operating income (loss)						Income (loss) before taxes
	2018			2017			2018			2017			2018			2017
Marine Technology Products	$	9,720		$	16,573		$	(3,391	)	$	1,234		$	(3,322	)	$	995
Equipment Leasing	6,520			12,816			(5,022		)	(6,644		)	(4,916		)	(6,561		)
Corporate expenses	—			—			(1,735		)	(1,851		)	(1,735		)	(1,851		)
Eliminations	(277		)	(120		)	—			—			1			(26		)
Consolidated	$	15,963		$	29,269		$	(10,148	)	$	(7,261	)	$	(9,972	)	$	(7,443	)

Sales from the Marine Technology Products segment to the Equipment Leasing segment are eliminated in consolidated revenues. Consolidated income before taxes reflects the elimination of profit from intercompany sales and depreciation expense on the difference between the sales price and the cost to manufacture the equipment. Fixed assets are reduced by the difference between the sales price and the cost to manufacture the equipment, less the accumulated depreciation related to the difference.

Organization (Policies)	6 Months Ended
Organization (Policies)	Jul. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization Mitcham Industries, Inc., a Texas corporation (the “Company”), was incorporated in 1987. The Company, through its wholly owned subsidiary, Seamap International Holdings Pte, Ltd. (“Seamap”), and its wholly owned subsidiary, Klein Marine Systems, Inc. (“Klein”), designs, manufactures and sells a broad range of proprietary products for the seismic, hydrographic and offshore industries with product sales and support facilities based in New Hampshire, Singapore and the United Kingdom. The Company, through its wholly owned Australian subsidiary, Seismic Asia Pacific Pty Ltd. (“SAP”), provides seismic, oceanographic and hydrographic leasing and sales worldwide, primarily in Southeast Asia and Australia. The Company, through its wholly owned Canadian subsidiary, Mitcham Canada, ULC (“MCL”), its wholly owned Russian subsidiary, Mitcham Seismic Eurasia LLC (“MSE”), its wholly owned Hungarian subsidiary, Mitcham Europe Ltd. (“MEL”), its wholly owned Singaporean subsidiary, Mitcham Marine Leasing Pte. Ltd. (“MML”), and its branch operations in Colombia, provides full-service equipment leasing, sales and service to the seismic industry worldwide. All intercompany transactions and balances have been eliminated in consolidation.
Basis of Presentation	Basis of Presentation The condensed consolidated balance sheet as of January 31, 2018 for the Company has been derived from audited consolidated financial statements. The unaudited interim condensed consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States have been condensed or omitted pursuant to such rules and regulations, although the Company believes that the disclosures are adequate to make the information presented not misleading. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the related notes included in the Company’s Annual Report on Form 10-K for the year ended January 31, 2018. In the opinion of the Company’s management, all adjustments, consisting only of normal recurring adjustments, necessary to present fairly the financial position as of July 31, 2018, the results of operations for the three and six months ended July 31, 2018 and 2017, and the cash flows for the six months ended July 31, 2018 and 2017, have been included in these condensed consolidated financial statements. The foregoing interim results are not necessarily indicative of the results of operations to be expected for the full fiscal year ending January 31, 2019.
New Accounting Pronouncements	New Accounting Pronouncements In January 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment, to simplify impairment testing of goodwill and other intangible assets by eliminating step two of the impairment test. The Company has adopted the provisions of ASU 2017-04 as of January 31, 2018. The adoption of ASU 2017-04 did not have a material effect on the Company's condensed consolidated financial statements. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, to address how certain cash receipts and cash payments are presented and classified in the statement of cash flows. This update addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. The Company has adopted the provisions of ASU No. 2016-15 as of February 1, 2018. The adoption of ASU No. 2016-15 did not have a material effect on the Company’s condensed consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842), to provide guidance on recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements, specifically differentiating between different types of leases. More specifically, the new guidance requires a lessee to recognize assets and liabilities for leases with terms of more than 12 months. ASU No. 2016-02 will be effective during the Company’s fiscal year ended January 31, 2020. Management has not yet completed its assessment of the impact of the new guidance. However, based on a preliminary review, the Company does not expect the adoption of ASU No. 2016-02 to have a material impact on its financial statements. The Company is continuing its assessment, which may identify additional impacts the adoption of ASU No. 2016-02 will have on its consolidated financial statements and disclosures. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which supersedes the revenue recognition requirements in ASC 605, Revenue Recognition. ASU 2014-09 was later amended by ASU No. 2016-10 Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing , and ASU No. 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients . ASU 2014-09, as amended, (the “New Revenue Standard”) supersedes most industry specific guidance and intends to enhance comparability of revenue recognition practices across entities and industries by providing a principle-based, comprehensive framework for addressing revenue recognition issues. The Company adopted the New Revenue Standard as of February 1, 2018 using the modified retrospective method. The adoption of the New Revenue Standard did not have a material impact on the Company’s consolidated financial statements.

Revenue from Contracts with Customers (Tables)

6 Months Ended

Jul. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table presents revenue from contracts with customers disaggregated by geography, based on shipping location of our customers (in thousands):



	Three Months Ended July 31, 2018		Six Months Ended July 31, 2018
	(in thousands)
United States	$	1,124	$	1,252
Europe, Russia & CIS	2,747		4,766
Middle East & Africa	122		636
Asia-Pacific	1,979		2,679
Canada & Latin America	40		387
Total revenue from contracts with customers	$	6,012	$	9,720

The following table presents revenue from contracts with customers disaggregated by product line and timing of revenue recognition (in thousands):



	Three Months Ended July 31, 2018		Six Months Ended July 31, 2018
Revenue recognized at a point in time:	(in thousands)
Seamap	$	3,611	$	5,156
Klein	1,401		2,877
SAP	797		1,277
Total revenue recognized at a point in time	$	5,809	$	9,310
Revenue recognized over time:
Seamap	$	203	$	410
Total revenue recognized over time	203		410
Total revenue from contracts with customers	$	6,012	$	9,720

Contract with Customer, Asset and Liability

As of July 31, 2018 contract assets and liabilities consisted of the following (in thousands):



	July 31, 2018
Contract Assets:	(in thousands)
Unbilled revenue-current	$	341
Unbilled revenue - non-current	—
Total unbilled revenue	$	341
Contract Liabilities:
Deferred revenue & customer deposits - current	$	934
Deferred revenue & customer deposits - non-current	8
Total deferred revenue & customer deposits	$	942

Acquisition of Assets (Tables)

6 Months Ended

Jul. 31, 2018

Business Combinations [Abstract]

Schedule of Business Acquisitions, by Acquisition

Details of the purchase price and the allocation of the purchase price to the assets acquired are as follows (in thousands):




Purchase Price:
Cash	$	3,000
Release of claims against Hydroscience	1,144
Transaction costs	312
Total purchase price	$	4,456

Allocation of purchase price:
Inventory	$	206
Tangible assets (mainly manufacturing equipment)	350
Intangible assets (including patents, designs & software)	3,900
Total purchase price	$	4,456

Balance Sheet (Tables)

6 Months Ended

Jul. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Accounts and Contracts Receivables



	July 31, 2018			January 31, 2018
	(in thousands)
Receivables:
Accounts receivable	$	11,490		$	16,392
Contracts receivable	3,823			4,921
	15,313			21,313
Less long-term portion	(700		)	(6,934		)
Current accounts and contracts receivable	14,613			14,379
Less current portion of allowance for doubtful accounts	(3,115		)	(3,885		)
Current portion of accounts and contracts receivable, net of allowance for doubtful accounts	$	11,498		$	10,494

Schedule of Inventories



	July 31, 2018			January 31, 2018
	(in thousands)
Inventories:
Raw materials	$	4,842		$	5,099
Finished goods	6,138			6,185
Work in progress	1,929			1,247
	12,909			12,531
Less allowance for obsolescence	(1,054		)	(1,675		)
Total inventories, net	$	11,855		$	10,856



	July 31, 2018			January 31, 2018
	(in thousands)
Inventories:
Raw materials	$	4,842		$	5,099
Finished goods	6,138			6,185
Work in progress	1,929			1,247
	12,909			12,531
Less allowance for obsolescence	(1,054		)	(1,675		)
Total inventories, net	$	11,855		$	10,856

Schedule of Seismic Equipment Lease Pool and Property and Equipment



	July 31, 2018			January 31, 2018
	(in thousands)
Seismic equipment lease pool and property and equipment:
Seismic equipment lease pool	$	168,646		$	174,274
Land and buildings	3,381			3,380
Furniture and fixtures	11,166			10,222
Autos and trucks	778			722
	183,971			188,598
Accumulated depreciation and amortization	(164,206		)	(165,698		)
Total seismic equipment lease pool and property and equipment, net	$	19,765		$	22,900



	July 31, 2018			January 31, 2018
	(in thousands)
Seismic equipment lease pool and property and equipment:
Seismic equipment lease pool	$	168,646		$	174,274
Land and buildings	3,381			3,380
Furniture and fixtures	11,166			10,222
Autos and trucks	778			722
	183,971			188,598
Accumulated depreciation and amortization	(164,206		)	(165,698		)
Total seismic equipment lease pool and property and equipment, net	$	19,765		$	22,900

Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Jul. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets



	Weighted Average Life at 7/31/2018	July 31, 2018										January 31, 2018
	Weighted Average Life at 7/31/2018	Gross Carrying Amount		Accumulated Amortization			Impairment			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Impairment			Net Carrying Amount
				(in thousands)										(in thousands)
Goodwill		$	7,060	$	—		$	(4,529	)	$	2,531	$	7,060	$	—		$	(4,529	)	$	2,531
Proprietary rights	7.9	$	9,286	$	(3,915	)	$	—		$	5,371	$	6,181	$	(3,663	)	$	—		$	2,518
Customer relationships	3.3	5,024		(2,805		)	—			2,219		5,024		(2,464		)	—			2,560
Patents	5.9	2,441		(903		)	—			1,538		1,730		(778		)	—			952
Trade name	7.8	894		(46		)	—			848		894		(41		)	—			853
Developed technology	7.4	1,430		(369		)	—			1,061		1,430		(298		)	—			1,132
Amortizable intangible assets		$	19,075	$	(8,038	)	$	—		$	11,037	$	15,259	$	(7,244	)	$	—		$	8,015

Future Estimated Amortization Expense Related to Amortizable Intangible Assets

As of July 31, 2018, future estimated amortization expense related to amortizable intangible assets was estimated to be:



For fiscal years ending January 31 (in thousands):
2019	$	902
2020	1,783
2021	1,636
2022	1,150
2023	964
2024 and thereafter	4,602
Total	$	11,037

Earnings per Share (Tables)

6 Months Ended

Jul. 31, 2018

Earnings Per Share [Abstract]

Basic and Diluted Weighted Average Common Shares Used in Earnings Per Share Calculation

The following table presents the calculation of basic and diluted weighted average common shares used in the earnings per share calculation:



	Three Months Ended July 31,		Six Months Ended July 31,
	2018	2017	2018	2017
	(in thousands)		(in thousands)
Basic weighted average common shares outstanding	12,093	12,082	12,090	12,080
Stock options	84	83	63	104
Unvested restricted stock	3	35	15	37
Total weighted average common share equivalents	87	118	78	141
Diluted weighted average common shares outstanding	12,180	12,200	12,168	12,221

Segment Reporting (Tables)

6 Months Ended

Jul. 31, 2018

Segment Reporting [Abstract]

Reconciliation of Assets from Segment to Consolidated

Financial information by business segment is set forth below (net of any allocations):



	As of July 31, 2018			As of January 31, 2018
	Total Assets			Total Assets
	(in thousands)
Marine Technology Products	$	43,228		$	35,879
Equipment Leasing	24,918			37,850
Eliminations	(32		)	(50		)
Consolidated	$	68,114		$	73,679

Reconciliation of Revenue from Segment to Consolidated

Results for the three months ended July 31, 2018 and 2017 were as follows (in thousands):



	Revenues						Operating income (loss)						Income (loss) before taxes
	2018			2017			2018			2017			2018			2017
Marine Technology Products	$	6,012		$	9,662		$	(1,016	)	$	850		$	(973	)	$	882
Equipment Leasing	2,473			1,271			(2,655		)	(4,988		)	(2,626		)	(5,041		)
Corporate expenses	—			—			(905		)	(834		)	(905		)	(834		)
Eliminations	(135		)	(97		)	—			—			—			(14		)
Consolidated	$	8,350		$	10,836		$	(4,576	)	$	(4,972	)	$	(4,504	)	$	(5,007	)

Results for the six months ended July 31, 2018 and 2017 were as follows (in thousands):



	Revenues						Operating income (loss)						Income (loss) before taxes
	2018			2017			2018			2017			2018			2017
Marine Technology Products	$	9,720		$	16,573		$	(3,391	)	$	1,234		$	(3,322	)	$	995
Equipment Leasing	6,520			12,816			(5,022		)	(6,644		)	(4,916		)	(6,561		)
Corporate expenses	—			—			(1,735		)	(1,851		)	(1,735		)	(1,851		)
Eliminations	(277		)	(120		)	—			—			1			(26		)
Consolidated	$	15,963		$	29,269		$	(10,148	)	$	(7,261	)	$	(9,972	)	$	(7,443	)

Revenue from Contracts with Customers - Revenue Disaggregation (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jul. 31, 2018	Jul. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 6,012	$ 9,720
Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	5,809	9,310
Revenue recognized over time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	203	410
Seamap \| Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	3,611	5,156
Seamap \| Revenue recognized over time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	203	410
Klein \| Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,401	2,877
SAP \| Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 797	$ 1,277

Revenue from Contracts with Customers - Revenue Disaggregated by Geography (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jul. 31, 2018	Jul. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 6,012	$ 9,720
United States
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,124	1,252
Europe, Russia & CIS
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	2,747	4,766
Middle East & Africa
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	122	636
Asia-Pacific
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,979	2,679
Canada & Latin America
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 40	$ 387

Revenue from Contracts with Customers - Contract Assets And Liabilities (Detail) $ in Thousands	6 Months Ended
	Jul. 31, 2018 USD ($)
Contract Assets:
Unbilled revenue-current	$ 341
Unbilled revenue - non-current	0
Total unbilled revenue	341
Contract Liabilities:
Deferred revenue & customer deposits - current	934
Deferred revenue & customer deposits - non-current	8
Total deferred revenue & customer deposits	$ 942
Minimum
Contract With Customers [Line Items]
Contract with customers, turn over period	3 months
Maximum
Contract With Customers [Line Items]
Contract with customers, turn over period	6 months

Acquisition of Assets (Detail) $ in Thousands	1 Months Ended
Acquisition of Assets (Detail) $ in Thousands	Feb. 28, 2018 USD ($) shares
Preferred Stock
Allocation of purchase price:
Stock issued during period (in shares) \| shares	152,290
Value of shares issued	$ 3,500
Hydroscience
Purchase Price:
Cash	3,000
Release of claims against Hydroscience	1,144
Transaction costs	312
Total purchase price	4,456
Allocation of purchase price:
Inventory	206
Tangible assets (mainly manufacturing equipment)	350
Intangible assets (including patents, designs & software)	3,900
Total purchase price	$ 4,456

Balance Sheet - Accounts and Contracts Receivables (Detail) - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018
Receivables:
Accounts receivable	$ 11,490	$ 16,392
Contracts receivable	3,823	4,921
Total receivables	15,313	21,313
Less long-term portion	(700)	(6,934)
Current accounts and contracts receivable	14,613	14,379
Less current portion of allowance for doubtful accounts	(3,115)	(3,885)
Current portion of accounts and contracts receivable, net of allowance for doubtful accounts	$ 11,498	$ 10,494

Balance Sheet - Additional Information (Detail)	6 Months Ended	12 Months Ended
Balance Sheet - Additional Information (Detail)	Jul. 31, 2018 USD ($) customer	Jan. 31, 2018 USD ($) customer
Balance Sheet [Line Items]
Contracts receivable	$ 3,823,000	$ 4,921,000
Number of customers due \| customer	4	4
Contracts receivable, interest rate	2.70%	2.20%
Impairment of long-lived assets		$ 0
Minimum
Balance Sheet [Line Items]
Contracts receivable repayment term	1 month
Maximum
Balance Sheet [Line Items]
Contracts receivable repayment term	40 months

Balance Sheet - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018
Inventories:
Raw materials	$ 4,842	$ 5,099
Finished goods	6,138	6,185
Work in progress	1,929	1,247
Cost of inventories	12,909	12,531
Less allowance for obsolescence	(1,054)	(1,675)
Total inventories, net	$ 11,855	$ 10,856

Balance Sheet - Schedule of Seismic Equipment Lease Pool and Property and Equipment (Detail) - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018
Seismic equipment lease pool and property and equipment:
Seismic equipment lease pool and property and equipment	$ 183,971	$ 188,598
Accumulated depreciation and amortization	(164,206)	(165,698)
Total seismic equipment lease pool and property and equipment, net	19,765	22,900
Seismic equipment lease pool
Seismic equipment lease pool and property and equipment:
Seismic equipment lease pool and property and equipment	168,646	174,274
Land and buildings
Seismic equipment lease pool and property and equipment:
Seismic equipment lease pool and property and equipment	3,381	3,380
Furniture and fixtures
Seismic equipment lease pool and property and equipment:
Seismic equipment lease pool and property and equipment	11,166	10,222
Autos and trucks
Seismic equipment lease pool and property and equipment:
Seismic equipment lease pool and property and equipment	$ 778	$ 722

Goodwill and Other Intangible Assets - Schedule of Net Carrying Amount (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2018	Jan. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Goodwill, Gross Carrying Amount	$ 7,060	$ 7,060
Goodwill, Impairment	(4,529)	(4,529)
Goodwill, Net Carrying Amount	2,531	2,531
Gross Carrying Amount	19,075	15,259
Accumulated Amortization	(8,038)	(7,244)
Net Carrying Amount	$ 11,037	8,015
Proprietary rights
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	7 years 10 months 24 days
Gross Carrying Amount	$ 9,286	6,181
Accumulated Amortization	(3,915)	(3,663)
Net Carrying Amount	$ 5,371	2,518
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	3 years 3 months 19 days
Gross Carrying Amount	$ 5,024	5,024
Accumulated Amortization	(2,805)	(2,464)
Net Carrying Amount	$ 2,219	2,560
Patents
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	5 years 10 months 24 days
Gross Carrying Amount	$ 2,441	1,730
Accumulated Amortization	(903)	(778)
Net Carrying Amount	$ 1,538	952
Trade name
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	7 years 9 months 18 days
Gross Carrying Amount	$ 894	894
Accumulated Amortization	(46)	(41)
Net Carrying Amount	$ 848	853
Developed technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	7 years 4 months 24 days
Gross Carrying Amount	$ 1,430	1,430
Accumulated Amortization	(369)	(298)
Net Carrying Amount	$ 1,061	$ 1,132

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended
	Jan. 31, 2018	Jul. 31, 2018	Jul. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment	$ 1,500,000
Additional impairment charges		$ 0
Aggregate amortization expense		$ 889,000	$ 716,000
Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life of intangible assets		5 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life of intangible assets		15 years

Goodwill and Other Intangible Assets - Future Estimated Amortization Expense Related to Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018
For fiscal years ending January 31 (in thousands):
2019	$ 902
2020	1,783
2021	1,636
2022	1,150
2023	964
2024 and thereafter	4,602
Net Carrying Amount	$ 11,037	$ 8,015

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017	Jan. 31, 2018
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 85,000	$ 357,000	$ 522,000	$ 586,000
Pre-tax net loss	4,504,000	5,007,000	$ 9,972,000	$ 7,443,000
Effective tax rate			(5.20%)	(7.90%)
Non-current prepaid income taxes	1,570,000		$ 1,570,000		$ 1,609,000
Unrecognized tax benefit	$ 0	$ 0	$ 0	$ 0

Earnings per Share - Basic and Diluted Weighted Average Common Shares Used in Earnings Per Share Calculation (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Earnings Per Share [Abstract]
Basic weighted average common shares outstanding	12,093	12,082	12,090	12,080
Stock options	84	83	63	104
Unvested restricted stock	3	35	15	37
Total weighted average common share equivalents	87	118	78	141
Diluted weighted average common shares outstanding	12,180	12,200	12,168	12,221

Related Party Transaction - Additional Information (Detail) - USD ($)		3 Months Ended	6 Months Ended
	Oct. 07, 2016	Jul. 31, 2018	Jul. 31, 2018	Jan. 31, 2018
Related Party Transaction [Line Items]
Maximum number of preferred stock to be issued (in shares)		1,000,000	1,000,000	1,000,000
Preferred stock, par value (in usd per share)		$ 1.00	$ 1.00	$ 1.00
Series A Preferred Stock
Related Party Transaction [Line Items]
Maximum number of preferred stock to be issued (in shares)	500,000
Preferred stock dividend rate	9.00%
Preferred stock, par value (in usd per share)	$ 1.00
Stock issued during period (in shares)		48,635	62,348
Series A Preferred Stock \| Non-Executive Chairman
Related Party Transaction [Line Items]
Equity distribution compensation expenses			$ 0
Series A Preferred Stock \| Ladenburg Thalmann & Co. Inc.
Related Party Transaction [Line Items]
Percentage of compensation fees to be paid	2.00%
Gross proceeds from preferred stock		$ 1,200,000	1,500,000
Equity distribution compensation expenses		$ 23,000	$ 30,000

Equity and Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Equity [Abstract]
Quarterly dividends declared (in usd per share)	$ 0.5625
Compensation expense related to stock-based awards granted	$ 242	$ 237	$ 368	$ 461

Subsequent Events (Details) $ in Millions	1 Months Ended
Subsequent Events (Details) $ in Millions	Aug. 31, 2018 USD ($)
Subsequent event
Subsequent Event [Line Items]
Proceeds from sale of subsidiary	$ 1.0

Segment Reporting - Financial Information by Business Segment (Assets) (Detail) - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018
Segment Reporting Information [Line Items]
Total Assets	$ 68,114	$ 73,679
Operating Segments \| Marine Technology Products
Segment Reporting Information [Line Items]
Total Assets	43,228	35,879
Operating Segments \| Equipment Leasing
Segment Reporting Information [Line Items]
Total Assets	24,918	37,850
Eliminations
Segment Reporting Information [Line Items]
Total Assets	$ (32)	$ (50)

Segment Reporting - Financial Information by Business Segment (Revenues) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Segment Reporting Information [Line Items]
Revenues	$ 8,350	$ 10,836	$ 15,963	$ 29,269
Operating income (loss)	(4,576)	(4,972)	(10,148)	(7,261)
Income (loss) before taxes	(4,504)	(5,007)	(9,972)	(7,443)
Operating Segments \| Marine Technology Products
Segment Reporting Information [Line Items]
Revenues	6,012	9,662	9,720	16,573
Operating income (loss)	(1,016)	850	(3,391)	1,234
Income (loss) before taxes	(973)	882	(3,322)	995
Operating Segments \| Equipment Leasing
Segment Reporting Information [Line Items]
Revenues	2,473	1,271	6,520	12,816
Operating income (loss)	(2,655)	(4,988)	(5,022)	(6,644)
Income (loss) before taxes	(2,626)	(5,041)	(4,916)	(6,561)
Corporate expenses
Segment Reporting Information [Line Items]
Revenues			0	0
Operating income (loss)	(905)	(834)	(1,735)	(1,851)
Income (loss) before taxes	(905)	(834)	(1,735)	(1,851)
Eliminations
Segment Reporting Information [Line Items]
Revenues	(135)	(97)	(277)	(120)
Operating income (loss)	0	0	0	0
Income (loss) before taxes	$ 0	$ (14)	$ 1	$ (26)