Note 13 - Equity and Stock-based Compensation (Details Textual) - USD ($)	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Jan. 31, 2022
Preferred Stock, Dividends Per Share, Declared (in dollars per share)	$ 0.5625
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	1,683,000		1,683,000
Preferred Stock, Liquidation Preference, Value	$ 42,000,000.0
Share-Based Payment Arrangement, Expense	$ 236,000	$ 109,000