Note 8 - Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	Jan. 31, 2022
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	18,819
Amortizable intangible assets, accumulated amortization	(12,316)	(12,041)
Intangible assets, net	5,743	6,018
Amortizable intangible assets, impairment	(760)	(760)
Proprietary Rights [Member]
Amortizable intangible assets, gross carrying amount	8,237	8,237
Amortizable intangible assets, accumulated amortization	(4,267)	(4,150)
Intangible assets, net	$ 3,970	4,087
Proprietary Rights [Member] | Weighted Average [Member]
Weighted average life (Year)	5 years 9 months 18 days
Customer Relationships [Member]
Amortizable intangible assets, gross carrying amount	$ 5,024	5,024
Amortizable intangible assets, accumulated amortization	(4,821)	(4,797)
Intangible assets, net	$ 203	227
Customer Relationships [Member] | Weighted Average [Member]
Weighted average life (Year)	3 months 18 days
Patents [Member]
Amortizable intangible assets, gross carrying amount	$ 2,540	2,540
Amortizable intangible assets, accumulated amortization	(1,840)	(1,778)
Intangible assets, net	$ 700	762
Patents [Member] | Weighted Average [Member]
Weighted average life (Year)	2 years 8 months 12 days
Trade Names [Member]
Amortizable intangible assets, gross carrying amount	$ 894	894
Amortizable intangible assets, accumulated amortization	(88)	(85)
Intangible assets, net	46	49
Amortizable intangible assets, impairment	$ (760)	(760)
Trade Names [Member] | Weighted Average [Member]
Weighted average life (Year)	4 years 1 month 6 days
Developed Technology Rights [Member]
Amortizable intangible assets, gross carrying amount	$ 1,430	1,430
Amortizable intangible assets, accumulated amortization	(906)	(870)
Intangible assets, net	$ 524	560
Developed Technology Rights [Member] | Weighted Average [Member]
Weighted average life (Year)	3 years 8 months 12 days
Other Intangible Assets [Member]
Amortizable intangible assets, gross carrying amount	$ 694	694
Amortizable intangible assets, accumulated amortization	(394)	(361)
Intangible assets, net	$ 300	$ 333
Other Intangible Assets [Member] | Weighted Average [Member]
Weighted average life (Year)	2 years 1 month 6 days