Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Revenues:
Total revenues	$ 21,215	$ 29,919
Cost of sales:
Total cost of sales	13,906	16,965
Gross profit	7,309	12,954
Operating expenses:
Selling, general and administrative	12,648	14,140
Research and development	3,003	1,850
Provision for doubtful accounts	659	0
Impairment of intangible assets	2,531	760
Depreciation and amortization	2,796	2,494
Total operating expenses	21,637	19,244
Operating loss	(14,328)	(6,290)
Other income:
Other income, net	862	100
Total other income	862	100
Loss from continuing operations before income taxes	(13,466)	(6,190)
Provision for income taxes	(536)	(353)
Loss from continuing operations	(14,002)	(6,543)
Loss from discontinued operations, net of income taxes	(6,304)	(4,744)
Net loss	(20,306)	(11,287)
Preferred stock dividends	(2,254)	(2,050)
Net loss attributable to common stockholders	$ (22,560)	$ (13,337)
Net loss per common share - Basic
Continuing operations (in usd per share)	$ (1.30)	$ (0.71)
Discontinued operations (in usd per share)	(0.50)	(0.39)
Net loss (in usd per share)	(1.80)	(1.10)
Net loss per common share - Diluted
Continuing operations (in usd per share)	(1.30)	(0.71)
Discontinued operations (in usd per share)	(0.50)	(0.39)
Net loss (in usd per share)	$ (1.80)	$ (1.10)
Shares used in computing loss per common share:
Basic (in shares)	12,519	12,143
Diluted (in shares)	12,519	12,143
Revenue from Contract with Customer, Product and Service [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember
Cost, Product and Service [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember