CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss	Non-controlling Interests	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			23,636				23,636
Foreign currency translation loss					(257)		(257)
Stock compensation expense		1,609					1,609
Stock option exercises and other share-based award settlements	$ 10	1,013					1,023
Stock option exercises and other share-based award settlements (in shares)	66,471
Cash dividends			(7,884)				(7,884)
Balances at Jul. 31, 2021	$ 2,366	155,937	181,862	(33)	(1,338)	1,741	340,535
Balances (in shares) at Jul. 31, 2021	15,769,440
Balances at Apr. 30, 2021	$ 2,366	155,007	172,934	(33)	(1,199)	1,741	330,816
Balances (in shares) at Apr. 30, 2021	15,769,440
Net income			12,870				12,870
Foreign currency translation loss					(139)		(139)
Stock compensation expense		930					930
Cash dividends			(3,942)				(3,942)
Balances at Jul. 31, 2021	$ 2,366	155,937	181,862	(33)	(1,338)	1,741	340,535
Balances (in shares) at Jul. 31, 2021	15,769,440
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			11,707				11,707
Foreign currency translation loss					(1,951)		(1,951)
Stock compensation expense		1,979					1,979
Stock option exercises and other share-based award settlements	$ 6	60					$ 66
Stock option exercises and other share-based award settlements (in shares)	39,099						2,000
Common stock repurchases				(53,168)			$ (53,168)
Common stock repurchases (in shares)	(1,412,592)						(1,412,592)
Cash dividends			(7,192)				$ (7,192)
Balances at Jul. 31, 2022	$ 2,374	160,229	193,205	(73,573)	(4,402)	(797)	277,036
Balances (in shares) at Jul. 31, 2022	13,884,195
Balances at Apr. 30, 2022	$ 2,374	159,170	192,463	(47,482)	(3,715)	(797)	302,013
Balances (in shares) at Apr. 30, 2022	14,585,908
Net income			4,222				4,222
Foreign currency translation loss					(687)		(687)
Stock compensation expense		1,059					1,059
Common stock repurchases				(26,091)			(26,091)
Common stock repurchases (in shares)	(701,713)
Cash dividends			(3,480)				(3,480)
Balances at Jul. 31, 2022	$ 2,374	$ 160,229	$ 193,205	$ (73,573)	$ (4,402)	$ (797)	$ 277,036
Balances (in shares) at Jul. 31, 2022	13,884,195