CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Jan. 31, 2025	$ 2,374	$ 168,966	$ 292,698	$ (105,643)	$ (6,538)	$ 351,857
Balances (in shares) at Jan. 31, 2025	13,634,214
Net income			22,550			22,550
Foreign currency translation gain (loss)					3,621	3,621
Net unrealized gains (losses) on available-for-sale securities					2,680	2,680
Stock compensation expense		1,188				1,188
Stock option exercises and restricted stock unit settlements, net		(4,556)		(1,526)		(6,082)
Stock option exercises and restricted stock unit settlements, net (in shares)	59,472
Common stock repurchases				(6,849)		$ (6,849)
Common stock repurchases (in shares)	(55,117)					(55,117)
Cash dividends			(5,070)			$ (5,070)
Balance at Apr. 30, 2025	$ 2,374	165,598	310,178	(114,018)	(237)	363,895
Balances (in shares) at Apr. 30, 2025	13,638,569
Balance at Jan. 31, 2026	$ 2,374	167,234	406,197	(114,361)	818	462,262
Balances (in shares) at Jan. 31, 2026	13,950,712
Net income			46,063			46,063
Foreign currency translation gain (loss)					(541)	(541)
Net unrealized gains (losses) on available-for-sale securities					(2,659)	(2,659)
Stock compensation expense		2,036				2,036
Stock option exercises and restricted stock unit settlements, net		(6,037)		(17,653)		(23,690)
Stock option exercises and restricted stock unit settlements, net (in shares)	76,165
Common stock repurchases				(2,955)		$ (2,955)
Common stock repurchases (in shares)	(6,450)					(6,450)
Cash dividends			(7,005)			$ (7,005)
Balance at Apr. 30, 2026	$ 2,374	$ 163,233	$ 445,255	$ (134,969)	$ (2,382)	$ 473,511
Balances (in shares) at Apr. 30, 2026	14,020,427