Note 9 - Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023
Amortizable intangible assets, gross carrying amount	$ 15,427	$ 15,406
Amortizable intangible assets, accumulated amortization	(12,354)	(11,773)
Intangible assets, net	3,073	3,633
Proprietary Rights [Member]
Amortizable intangible assets, gross carrying amount	7,473	7,473
Amortizable intangible assets, accumulated amortization	(4,943)	(4,612)
Intangible assets, net	$ 2,530	2,861
Proprietary Rights [Member] | Weighted Average [Member]
Weighted average life (Year)	5 years 1 month 6 days
Customer Relationships [Member]
Amortizable intangible assets, gross carrying amount	$ 4,884	4,884
Amortizable intangible assets, accumulated amortization	(4,827)	(4,754)
Intangible assets, net	$ 57	130
Customer Relationships [Member] | Weighted Average [Member]
Weighted average life (Year)	1 month 6 days
Patents [Member]
Amortizable intangible assets, gross carrying amount	$ 2,540	2,540
Amortizable intangible assets, accumulated amortization	(2,140)	(2,027)
Intangible assets, net	$ 400	513
Patents [Member] | Weighted Average [Member]
Weighted average life (Year)	1 year 7 months 6 days
Trade Names [Member]
Amortizable intangible assets, gross carrying amount	$ 134	134
Amortizable intangible assets, accumulated amortization	(105)	(97)
Intangible assets, net	$ 29	37
Trade Names [Member] | Weighted Average [Member]
Weighted average life (Year)	2 years 7 months 6 days
Other Intangible Assets [Member]
Amortizable intangible assets, gross carrying amount	$ 396	375
Amortizable intangible assets, accumulated amortization	(339)	(283)
Intangible assets, net	$ 57	$ 92
Other Intangible Assets [Member] | Weighted Average [Member]
Weighted average life (Year)	4 months 24 days