Note 15 - Treasury Stock - Repurchases of Common Stock (Details) - $ / shares	1 Months Ended					3 Months Ended	9 Months Ended		10 Months Ended
	Jul. 31, 2022	Jan. 31, 2022	Dec. 31, 2021	Nov. 30, 2021	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2022	Oct. 31, 2021	Jul. 31, 2022
Total number of shares purchased (in shares)						0
Approximate dollar value of shares that may yet be purchased under the plans or programs (in shares)	964	1,008	1,872	2,323	2,505			2,505	964
Publicly Announced Share Repurchase Program [Member]
Total number of shares purchased (in shares)	5	98	56	21	59				239
Treasury Stock [Member]
Total number of shares purchased (in shares)	5	98	56	21	59		4,887	234,281	239
Average price paid per share (in dollars per share)	$ 8.85	$ 8.81	$ 7.99	$ 8.55	$ 8.45