Note 11 - Earnings Per Share - Calculation of Basic and Diluted Weighted Average Common Shares Used in Earnings Per Share Calculation (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021
Basic (in shares)	13,788	13,774	13,782	13,769
Total weighted average common share equivalents (in shares)	1	96	6	108
Diluted weighted average common shares outstanding (in shares)	13,789	13,870	13,788	13,877
Share-Based Payment Arrangement, Option [Member]
Stock options (in shares)	0	66	0	80
Restricted Stock [Member]
Stock options (in shares)	1	30	6	28