Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Revenues:
Sale of marine technology products	$ 25,571	$ 27,420	$ 25,058
Equipment leasing	11,427	7,826	10,161
Sale of lease pool and other equipment	5,944	13,030	5,780
Total revenues	42,942	48,276	40,999
Cost of sales:
Sale of marine technology products	14,863	16,686	13,571
Equipment leasing (including lease pool depreciation of $9,186, $14,370 and $25,753 at January 31, 2019, 2018 2017, respectively)	13,522	17,764	29,037
Equipment sales	2,817	7,742	5,805
Total cost of sales	31,202	42,192	48,413
Gross profit (loss)	11,740	6,084	(7,414)
Operating expenses:
Selling, general and administrative	20,905	19,663	19,753
Research and development	1,159	1,502	974
Provision for doubtful accounts	200	1,013	750
Impairment of intangible assets	0	1,466	0
Depreciation and amortization	2,496	2,148	2,399
Total operating expenses	24,760	25,792	23,876
Operating loss	(13,020)	(19,708)	(31,290)
Other income (expense):
Loss on sale (including $5,355 of cumulative translation loss)	(5,405)	0	0
Reserve against non-current prepaid income taxes	(1,211)	0	0
Interest income (expense)	72	47	(643)
Other, net	(24)	(498)	594
Total other expense	(6,568)	(451)	(49)
Loss before income taxes	(19,588)	(20,159)	(31,339)
Provision for income taxes	(252)	(910)	(1,814)
Net loss	(19,840)	(21,069)	(33,153)
Preferred stock dividends	(1,708)	(905)	(486)
Net loss attributable to common shareholders	$ (21,548)	$ (21,974)	$ (33,639)
Net loss per common share:
Basic (in usd per share)	$ (1.78)	$ (1.82)	$ (2.79)
Diluted (in usd per share)	$ (1.78)	$ (1.82)	$ (2.79)
Shares used in computing loss per common share:
Basic (in shares)	12,105	12,084	12,070
Diluted (in shares)	12,105	12,084	12,070