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Segment Reporting (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012
Financial information by business segment
Revenues	$ 20,895	$ 23,080	$ 48,186	$ 57,711
Operating (loss) income	(2,126)	1,341	6,057	13,007
(Loss) Income before taxes	(966)	1,274	6,953	12,337
Equipment Leasing [Member]
Financial information by business segment
Revenues	13,937	15,818	37,301	39,905
Operating (loss) income	(3,428)	(1,313)	4,730	5,714
(Loss) Income before taxes	(2,504)	(1,634)	5,331	5,092
Seamap [Member]
Financial information by business segment
Revenues	7,042	7,454	10,976	18,295
Operating (loss) income	1,260	2,617	1,234	7,178
(Loss) Income before taxes	1,496	2,871	1,529	7,130
Eliminations [Member]
Financial information by business segment
Revenues	(84)	(192)	(91)	(489)
Operating (loss) income	42	37	93	115
(Loss) Income before taxes	$ 42	$ 37	$ 93	$ 115

X

- Definition

Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h)(1)(i))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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X

- Definition

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

+ References

No definition available.

+ Details

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X

- 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



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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