Note 13 - Equity and Stock-based Compensation (Details Textual) - USD ($)	3 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Jan. 31, 2023
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	1,683,000		1,683,000
Preferred Stock, Liquidation Preference, Value	$ 43,900,000
Preferred Stock, Amount of Preferred Dividends in Arrears	$ 3,800,000
Preferred Stock, Liquidation Preference Per Share (in dollars per share)	$ 25.00
Share-Based Payment Arrangement, Expense	$ 50,000	$ 236,000
Preferred Stock [Member] | Quarterly Dividends [Member]
Dividends Payable, Amount Per Share (in dollars per share)	$ 0.5625	$ 0.5625