Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Revenues:
Sale of marine technology products	$ 27,420	$ 25,058	$ 25,163
Equipment leasing	7,826	10,161	23,710
Sale of lease pool equipment	13,030	5,780	2,946
Total revenues	48,276	40,999	51,819
Cost of sales:
Sale of marine technology products	16,686	13,571	13,376
Equipment leasing (including lease pool depreciation of $14,370, $25,753 and $29,462 at January 31, 2018, January 31, 2017 and January 31, 2016, respectively)	17,764	29,037	34,120
Lease pool equipment sales	7,742	5,805	1,654
Total cost of sales	42,192	48,413	49,150
Gross profit (loss)	6,084	(7,414)	2,669
Operating expenses:
Selling, general and administrative	19,663	19,753	18,035
Research and development	1,502	974	931
Provision for doubtful accounts	1,013	750	2,201
Contract settlement	0	0	2,142
Impairment of intangible assets	1,466	0	3,609
Depreciation and amortization	2,148	2,399	2,511
Total operating expenses	25,792	23,876	29,429
Operating loss	(19,708)	(31,290)	(26,760)
Other income (expense):
Interest income (expense)	47	(643)	(725)
Other, net	(498)	594	(274)
Total other expense	(451)	(49)	(999)
Loss before income taxes	(20,159)	(31,339)	(27,759)
Provision for income taxes	(910)	(1,814)	(10,977)
Net loss	(21,069)	(33,153)	(38,736)
Preferred stock dividends	(905)	(486)	0
Net loss attributable to common shareholders	$ (21,974)	$ (33,639)	$ (38,736)
Net loss per common share:
Basic (in usd per share)	$ (1.82)	$ (2.79)	$ (3.22)
Diluted (in usd per share)	$ (1.82)	$ (2.79)	$ (3.22)
Shares used in computing loss per common share:
Basic (in shares)	12,084	12,070	12,041
Diluted (in shares)	12,084	12,070	12,041