Note 8 - Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Apr. 30, 2023	Jan. 31, 2023
Amortizable intangible assets, gross carrying amount	$ 18,840	$ 18,831
Amortizable intangible assets, accumulated amortization	(13,416)	(13,140)
Intangible assets, net	4,664	4,931
Amortizable intangible assets, impairment	(760)	(760)
Proprietary Rights [Member]
Amortizable intangible assets, gross carrying amount	8,238	8,238
Amortizable intangible assets, accumulated amortization	(4,722)	(4,606)
Intangible assets, net	$ 3,516	3,632
Proprietary Rights [Member] | Weighted Average [Member]
Weighted average life (Year)	4 years 10 months 24 days
Customer Relationships [Member]
Amortizable intangible assets, gross carrying amount	$ 5,024	5,024
Amortizable intangible assets, accumulated amortization	(4,919)	(4,894)
Intangible assets, net	$ 105	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	(2,090)	(2,027)
Intangible assets, net	$ 450	513
Patents [Member] | Weighted Average [Member]
Weighted average life (Year)	1 year 9 months 18 days
Trade Names [Member]
Amortizable intangible assets, gross carrying amount	$ 894	894
Amortizable intangible assets, accumulated amortization	(99)	(97)
Intangible assets, net	35	37
Amortizable intangible assets, impairment	$ (760)	(760)
Trade Names [Member] | Weighted Average [Member]
Weighted average life (Year)	3 years 1 month 6 days
Developed Technology Rights [Member]
Amortizable intangible assets, gross carrying amount	$ 1,430	1,430
Amortizable intangible assets, accumulated amortization	(1,049)	(1,013)
Intangible assets, net	$ 381	417
Developed Technology Rights [Member] | Weighted Average [Member]
Weighted average life (Year)	2 years 8 months 12 days
Other Intangible Assets [Member]
Amortizable intangible assets, gross carrying amount	$ 714	705
Amortizable intangible assets, accumulated amortization	(537)	(503)
Intangible assets, net	$ 177	$ 202
Other Intangible Assets [Member] | Weighted Average [Member]
Weighted average life (Year)	1 year 1 month 6 days