Note 8 - Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 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	18,818	18,819
Amortizable intangible assets, accumulated amortization	(12,589)	(12,041)
Intangible assets, net	5,469	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	(4,382)	(4,150)
Intangible assets, net	$ 3,855	4,087
Proprietary Rights [Member] | Weighted Average [Member]
Weighted average life (Year)	5 years 7 months 6 days
Customer Relationships [Member]
Amortizable intangible assets, gross carrying amount	$ 5,024	5,024
Amortizable intangible assets, accumulated amortization	(4,845)	(4,797)
Intangible assets, net	$ 179	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	(1,902)	(1,778)
Intangible assets, net	$ 638	762
Patents [Member] | Weighted Average [Member]
Weighted average life (Year)	2 years 4 months 24 days
Trade Names [Member]
Amortizable intangible assets, gross carrying amount	$ 894	894
Amortizable intangible assets, accumulated amortization	(91)	(85)
Intangible assets, net	43	49
Amortizable intangible assets, impairment	$ (760)	(760)
Trade Names [Member] | Weighted Average [Member]
Weighted average life (Year)	3 years 9 months 18 days
Developed Technology Rights [Member]
Amortizable intangible assets, gross carrying amount	$ 1,430	1,430
Amortizable intangible assets, accumulated amortization	(941)	(870)
Intangible assets, net	$ 489	560
Developed Technology Rights [Member] | Weighted Average [Member]
Weighted average life (Year)	3 years 4 months 24 days
Other Intangible Assets [Member]
Amortizable intangible assets, gross carrying amount	$ 693	694
Amortizable intangible assets, accumulated amortization	(428)	(361)
Intangible assets, net	$ 265	$ 333
Other Intangible Assets [Member] | Weighted Average [Member]
Weighted average life (Year)	1 year 9 months 18 days