Note 8 - Retirement Plans - Benefit Obligations, Plan Assets and Funded Status of Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Accumulated benefits	$ 6,448	$ 7,090
Benefit obligation - beginning of year	7,090	6,959
Interest cost	173	190
Actuarial loss	(511)	256
Benefits paid	(304)	(315)
Benefit obligation - end of year	6,448	7,090
Fair value of plan assets - beginning of year	7,016	6,550
Actual gain on plan assets	423	781
Benefits paid	304	315
Fair value of plan assets - end of year	7,135	7,016
Over-funded/(unfunded) status	688	(74)
Prepaid expenses and other current assets	322	332
Other assets	2,050	1,828
Deferred compensation liabilities	(1,684)	(2,234)
Net amount recognized	688	(74)
Unrecognized actuarial loss	1,362	1,902
Net amount recognized	$ 1,362	$ 1,902