Note 13 - Equity and Stock-based Compensation (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021	Jan. 31, 2022
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	1,683,000		1,683,000		1,683,000
Preferred Stock, Liquidation Preference, Value	$ 42,000,000.0		$ 42,000,000.0
Preferred Stock, Liquidation Preference Per Share (in dollars per share)	$ 25.00		$ 25.00
Share-Based Payment Arrangement, Expense	$ 152,000	$ 115,000	$ 388,000	$ 224,000
Preferred Stock [Member] | Quarterly Dividends [Member]
Dividends Payable, Amount Per Share (in dollars per share)	$ 0.5625		$ 0.5625