Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Revenues:
Sale of marine technology products	$ 29,538	$ 25,571	$ 27,420
Equipment leasing	11,206	11,427	7,826
Sale of lease pool and other equipment	1,931	5,944	13,030
Total revenues	42,675	42,942	48,276
Cost of sales:
Sale of marine technology products	16,481	14,863	16,686
Equipment leasing (including lease pool depreciation of $4,959, $9,186 and $14,370 at January 31, 2020, 2019 and 2018, respectively)	8,983	13,522	17,764
Equipment sales	590	2,817	7,742
Total cost of sales	26,054	31,202	42,192
Gross profit	16,621	11,740	6,084
Operating expenses:
Selling, general and administrative	19,716	20,905	19,663
Research and development	1,850	1,159	1,502
Provision for doubtful accounts	2,000	200	1,013
Impairment of intangible assets	760	0	1,466
Depreciation and amortization	2,670	2,496	2,148
Total operating expenses	26,996	24,760	25,792
Operating loss	(10,375)	(13,020)	(19,708)
Other income (expense):
Loss on sale (including $5,355 of cumulative translation loss)	0	(5,405)	0
Reserve against non-current prepaid income taxes	0	(1,211)	0
Interest (expense) income, net	(46)	72	47
Other, net	12	(24)	(498)
Total other expense	(34)	(6,568)	(451)
Loss before income taxes	(10,409)	(19,588)	(20,159)
Provision for income taxes	(878)	(252)	(910)
Net loss	(11,287)	(19,840)	(21,069)
Preferred stock dividends	(2,050)	(1,708)	(905)
Net loss attributable to common shareholders	$ (13,337)	$ (21,548)	$ (21,974)
Net loss per common share:
Basic (in usd per share)	$ (1.10)	$ (1.78)	$ (1.82)
Diluted (in usd per share)	$ (1.10)	$ (1.78)	$ (1.82)
Shares used in computing loss per common share:
Basic (in shares)	12,143	12,105	12,084
Diluted (in shares)	12,143	12,105	12,084