Segment Reporting - Financial Information by Business Segment (Revenues) (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Segment Reporting Information [Line Items]
Revenues	$ 15,681	$ 22,906	$ 40,377	$ 68,183
Operating (loss) income	(5,978)	194	(15,739)	970
(Loss) income before taxes	(6,559)	(340)	(15,596)	483
Operating Segments [Member] \| Equipment Leasing [Member]
Segment Reporting Information [Line Items]
Revenues	5,753	17,115	23,150	48,623
Operating (loss) income	(9,015)	(188)	(17,884)	(1,737)
(Loss) income before taxes	(9,563)	(1,071)	(17,682)	(2,303)
Operating Segments [Member] \| Seamap [Member]
Segment Reporting Information [Line Items]
Revenues	9,975	5,827	17,363	20,032
Operating (loss) income	3,001	337	2,039	2,827
(Loss) income before taxes	2,968	686	1,980	2,906
Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(47)	(36)	(136)	(472)
Operating (loss) income	36	45	106	(120)
(Loss) income before taxes	$ 36	$ 45	$ 106	$ (120)

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=51673353&loc=d3e41242-110953

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 10
-Article 5

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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