Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Revenues:
Equipment leasing	$ 10,882	$ 12,272	$ 31,890	$ 29,047
Lease pool equipment sales	3,204	326	5,536	661
Seamap equipment sales	7,262	6,534	17,806	14,883
Other equipment sales	1,732	2,146	2,479	3,189
Total revenues	23,080	21,278	57,711	47,780
Cost of sales:
Direct costs - equipment leasing	1,940	1,826	4,645	3,983
Direct costs - lease pool depreciation	8,437	6,703	16,831	12,793
Cost of lease pool equipment sales	1,007	107	2,411	204
Cost of Seamap and other equipment sales	4,296	4,429	9,538	8,662
Total cost of sales	15,680	13,065	33,425	25,642
Gross profit	7,400	8,213	24,286	22,138
Operating expenses:
General and administrative	5,719	5,794	11,038	10,442
Recovery of doubtful accounts		(492)	(428)	(492)
Depreciation and amortization	340	312	669	617
Total operating expenses	6,059	5,614	11,279	10,567
Operating income	1,341	2,599	13,007	11,571
Other income (expenses):
Interest, net	(96)	(95)	(101)	(270)
Other, net	29	(336)	(569)	(672)
Total other income (expenses)	(67)	(431)	(670)	(942)
Income before income taxes	1,274	2,168	12,337	10,629
Benefit (provision) for income taxes	5,128	(868)	2,521	(3,236)
Net income	$ 6,402	$ 1,300	$ 14,858	$ 7,393
Net income per common share:
Basic	$ 0.51	$ 0.12	$ 1.17	$ 0.71
Diluted	$ 0.48	$ 0.11	$ 1.12	$ 0.67
Shares used in computing net income per common share:
Basic	12,665	10,970	12,646	10,447
Diluted	13,262	11,615	13,294	11,043