Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Revenues:
Sale of marine technology products	$ 6,723	$ 5,877	$ 12,700	$ 9,443
Equipment leasing	1,374	1,630	4,697	4,327
Sale of lease pool equipment and other equipment	801	843	1,358	2,193
Total revenues	8,898	8,350	18,755	15,963
Cost of sales:
Sale of marine technology products	3,887	3,216	7,342	5,302
Equipment leasing (including lease pool depreciation of $1,143 and $2,445 for the three months ended July 31, 2019 and 2018, respectively, and $2,589 and $5,099 for the six months ended July 31, 2019 and 2018 respectively)	1,880	3,242	4,291	6,824
Equipment sales	249	32	499	732
Total cost of sales	6,016	6,490	12,132	12,858
Gross profit	2,882	1,860	6,623	3,105
Operating expenses:
Selling, general and administrative	4,795	5,504	10,027	11,134
Research and development	498	312	813	682
Provision for doubtful accounts	0	0	0	200
Depreciation and amortization	651	620	1,301	1,237
Total operating expenses	5,944	6,436	12,141	13,253
Operating loss	(3,062)	(4,576)	(5,518)	(10,148)
Other income (expense):
Interest (expense) income, net	(11)	17	(22)	35
Other, net	(15)	55	92	141
Total other (expense) income	(26)	72	70	176
Loss before income taxes	(3,088)	(4,504)	(5,448)	(9,972)
Provision for income taxes	(48)	(85)	(103)	(522)
Net loss	(3,136)	(4,589)	(5,551)	(10,494)
Preferred stock dividends	(499)	(411)	(970)	(796)
Net loss attributable to common shareholders	$ (3,635)	$ (5,000)	$ (6,521)	$ (11,290)
Net loss per common share:
Basic (in usd per share)	$ (0.30)	$ (0.41)	$ (0.54)	$ (0.93)
Diluted (in usd per share)	$ (0.30)	$ (0.41)	$ (0.54)	$ (0.93)
Shares used in computing net loss per common share:
Basic (in shares)	12,128	12,093	12,124	12,090
Diluted (in shares)	12,128	12,093	12,124	12,090