Note 11 - Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Goodwill, gross carrying amount	$ 7,060	$ 7,060
Goodwill, impairment	(7,060)	(7,060)
Goodwill, net carrying amount	0	0
Amortizable intangible assets, gross carrying amount	18,819	18,253
Amortizable intangible assets, accumulated amortization	(12,041)	(10,743)
Intangible assets, net	6,018	6,750
Amortizable intangible assets, impairment	(760)	(760)
Proprietary Rights [Member]
Amortizable intangible assets, gross carrying amount	8,237	7,781
Amortizable intangible assets, accumulated amortization	(4,150)	(3,688)
Intangible assets, net	$ 4,087	4,093
Proprietary Rights [Member] | Weighted Average [Member]
Weighted average life (Year)	6 years
Customer Relationships [Member]
Weighted average life (Year)	8 years
Amortizable intangible assets, gross carrying amount	$ 5,024	5,024
Amortizable intangible assets, accumulated amortization	(4,797)	(4,513)
Intangible assets, net	$ 227	511
Customer Relationships [Member] | Weighted Average [Member]
Weighted average life (Year)	4 months 24 days
Patents [Member]
Amortizable intangible assets, gross carrying amount	$ 2,540	2,440
Amortizable intangible assets, accumulated amortization	(1,778)	(1,528)
Intangible assets, net	$ 762	912
Patents [Member] | Weighted Average [Member]
Weighted average life (Year)	2 years 10 months 24 days
Trade Names [Member]
Amortizable intangible assets, gross carrying amount	$ 894	894
Amortizable intangible assets, accumulated amortization	(85)	(74)
Intangible assets, net	49	60
Amortizable intangible assets, impairment	$ (760)	(760)
Trade Names [Member] | Weighted Average [Member]
Weighted average life (Year)	4 years 3 months 18 days
Developed Technology Rights [Member]
Amortizable intangible assets, gross carrying amount	$ 1,430	1,430
Amortizable intangible assets, accumulated amortization	(870)	(727)
Intangible assets, net	$ 560	703
Developed Technology Rights [Member] | Weighted Average [Member]
Weighted average life (Year)	3 years 10 months 24 days
Other Intangible Assets [Member]
Amortizable intangible assets, gross carrying amount	$ 694	684
Amortizable intangible assets, accumulated amortization	(361)	(213)
Intangible assets, net	$ 333	$ 471
Other Intangible Assets [Member] | Weighted Average [Member]
Weighted average life (Year)	2 years 3 months 18 days