Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2010
Revenues:
Equipment leasing	$ 70,137	$ 36,825	$ 27,702
Lease pool equipment sales	6,503	2,470	3,321
Seamap equipment sales	28,406	21,345	20,567
Other equipment sales	7,788	10,723	3,582
Total revenues	112,834	71,363	55,172
Cost of sales:
Direct costs-equipment leasing	8,059	3,739	3,760
Direct costs-lease pool depreciation	27,400	21,354	17,712
Cost of lease pool equipment sales	1,580	1,130	2,566
Cost of Seamap and other equipment sales	18,043	18,498	13,009
Total cost of sales	55,082	44,721	37,047
Gross profit	57,752	26,642	18,125
Operating expenses:
General and administrative	21,354	16,755	14,977
Provision for doubtful accounts	615	1,795	1,378
Depreciation and amortization	1,239	1,171	899
Total operating expenses	23,208	19,721	17,254
Operating income	34,544	6,921	871
Other income (expense):
Gain from bargain purchase in business combination		1,304
Interest income	344	283	214
Interest expense	(740)	(756)	(629)
Other, net	182	(958)	183
Total other expense	(214)	(127)	(232)
Income before income taxes	34,330	6,794	639
Provision for income taxes	10,009	2,065	119
Net income	$ 24,321	$ 4,729	$ 520
Net income per common share:
Basic	$ 2.13	$ 0.48	$ 0.05
Diluted	$ 2.02	$ 0.46	$ 0.05
Shares used in computing income per common share:
Basic	11,432	9,870	9,799
Diluted	12,069	10,181	9,963