Note 18 - Stock Option Plans - Stock Option Activiy (Details) - USD ($) $ / shares in Units, shares in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022
Outstanding, number of shares (in shares)	3,425
Outstanding, weighted average exercise price (in dollars per share)	$ 3.53
Outstanding, weighted average remaining contractual term (Year)	5 years 10 months 28 days	6 years 6 months 29 days
Outstanding, intrinsic value	$ 0	$ 100,000
Granted, number of shares (in shares)	895
Granted, weighted average exercise price (in dollars per share)	$ 0.81
Exercised, number of shares (in shares)	(0)	0
Exercised, weighted average exercise price (in dollars per share)	$ 0
Forfeited, number of shares (in shares)	0
Forfeited, weighted average exercise price (in dollars per share)	$ 0
Expired, number of shares (in shares)	(225)
Expired, weighted average exercise price (in dollars per share)	$ 5.30
Outstanding, number of shares (in shares)	4,095	3,425
Outstanding, weighted average exercise price (in dollars per share)	$ 2.84	$ 3.53
Exercisable, number of shares (in shares)	2,693
Exercisable, weighted average exercise price (in dollars per share)	$ 3.68
Exercisable, weighted average remaining contractual term (Year)	4 years 3 months
Exercisable, intrinsic value	$ 0
Nonvested, number of shares (in shares)	1,402
Nonvested, weighted average exercise price (in dollars per share)	$ 1.23
Nonvested, weighted average remaining contractual term (Year)	9 years 1 month 9 days
Nonvested, intrinsic value	$ 0