Note 14 - Treasury Stock - Repurchases of Common Stock (Details) - $ / shares	1 Months Ended			3 Months Ended	6 Months Ended
	Jul. 31, 2022	Jun. 30, 2022	May 31, 2022	Jul. 31, 2022	Jul. 31, 2022	Jul. 31, 2021
Approximate dollar value of shares that may yet be purchased under the plans or programs (in shares)	964,496	1,008,444	1,008,444	964,496	964,496
Publicly Announced Share Repurchase Program [Member]
Total number of shares purchased (in shares)	4,887	0	0	4,887
Treasury Stock [Member]
Total number of shares purchased (in shares)	4,887	0	0	4,887	4,887	234,281
Average price paid per share (in dollars per share)	$ 8.85	$ 0	$ 0