CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss	Non-controlling Interest	Total
Balances at Jan. 31, 2021	$ 2,356	$ 153,315	$ 166,110	$ (33)	$ (1,081)	$ 1,741	$ 322,408
Balances (in shares) at Jan. 31, 2021	15,702,969
Net income (loss)			38,244			(2,538)	35,706
Foreign currency translation loss					(1,370)		(1,370)
Stock compensation expense		3,459					3,459
Stock option exercises	$ 12	1,416					1,428
Stock option exercises (in shares)	82,471
Common stock repurchases				(20,372)			$ (20,372)
Common stock repurchases (in shares)	(527,752)						(527,752)
Cash dividends			(15,664)				$ (15,664)
Balances at Jan. 31, 2022	$ 2,368	158,190	188,690	(20,405)	(2,451)	(797)	325,595
Balances (in shares) at Jan. 31, 2022	15,257,688
Net income (loss)			33,098			1,606	34,704
Foreign currency translation loss					(425)		(425)
Stock compensation expense		3,958					3,958
Stock option exercises	$ 6	60					66
Stock option exercises (in shares)	39,616
Common stock repurchases				(68,236)			$ (68,236)
Common stock repurchases (in shares)	(1,855,714)						(1,855,714)
Cash dividends			(13,956)				$ (13,956)
Distribution to non-controlling interest						(677)	(677)
Deconsolidation of VIEs						$ (132)	(132)
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 (loss)			32,358				32,358
Foreign currency translation loss					(920)		(920)
Net unrealized gains on available-for-sale securities					199		199
Stock compensation expense		4,455					$ 4,455
Stock option exercises (in shares)							94,000
Stock option exercises and restricted stock unit settlements, net of shares withheld for exercise price and withholding taxes		(2,480)		3,577			$ 1,097
Stock option exercises and restricted stock unit settlements, net of shares withheld for exercise price and withholding taxes (in shares)	104,090
Common stock repurchases				(12,464)			$ (12,464)
Common stock repurchases (in shares)	(303,160)						(230,160)
Cash dividends			(14,683)				$ (14,683)
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