CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss	Total
Balances at Jan. 31, 2023	$ 2,374	$ 162,208	$ 207,832	$ (88,641)	$ (2,876)	$ 280,897
Balances (in shares) at Jan. 31, 2023	13,441,590
Net income			2,109			2,109
Foreign currency translation gain (loss)					440	440
Net unrealized losses on available-for-sale securities					(37)	(37)
Stock compensation expense		1,034				1,034
Stock option exercises and restricted stock unit settlements, net of shares withheld for exercise price and withholding taxes		(1,895)		2,439		544
Stock option exercises and restricted stock unit settlements, net of shares withheld for exercise price and withholding taxes (in shares)	65,470
Common stock repurchases				(3,681)		$ (3,681)
Common stock repurchases (in shares)	(92,656)					(92,656)
Cash dividends			(3,357)			$ (3,357)
Balances at Apr. 30, 2023	$ 2,374	161,347	206,584	(89,883)	(2,473)	277,949
Balances (in shares) at Apr. 30, 2023	13,414,404
Balances at Jan. 31, 2024	$ 2,374	164,183	225,507	(97,528)	(3,597)	290,939
Balances (in shares) at Jan. 31, 2024	13,242,520
Net income			7,882			7,882
Foreign currency translation gain (loss)					(790)	(790)
Net unrealized losses on available-for-sale securities					(969)	(969)
Stock compensation expense		1,211				$ 1,211
Stock option exercises (in shares)						249,000
Stock option exercises and restricted stock unit settlements, net of shares withheld for exercise price and withholding taxes		(893)		(13)		$ (906)
Stock option exercises and restricted stock unit settlements, net of shares withheld for exercise price and withholding taxes (in shares)	113,260
Common stock repurchases				(187)		$ (187)
Common stock repurchases (in shares)	(5,600)					(5,600)
Cash dividends			(4,025)			$ (4,025)
Balances at Apr. 30, 2024	$ 2,374	$ 164,501	$ 229,364	$ (97,728)	$ (5,356)	$ 293,155
Balances (in shares) at Apr. 30, 2024	13,350,180