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			36,029				36,029
Foreign currency translation loss					(728)		(728)
Stock compensation expense		2,521					2,521
Stock option exercises and other share-based award settlements	$ 12	1,384					1,396
Stock option exercises and other share-based award settlements (in shares)	81,471
Cash dividends			(11,831)				(11,831)
Balances at Oct. 31, 2021	$ 2,368	157,220	190,308	(33)	(1,809)	1,741	349,795
Balances (in shares) at Oct. 31, 2021	15,784,440
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
Net income			12,393				12,393
Foreign currency translation loss					(471)		(471)
Stock compensation expense		913					913
Stock option exercises and other share-based award settlements	$ 2	370					372
Stock option exercises and other share-based award settlements (in shares)	15,000
Cash dividends			(3,947)				(3,947)
Balances at Oct. 31, 2021	$ 2,368	157,220	190,308	(33)	(1,809)	1,741	349,795
Balances (in shares) at Oct. 31, 2021	15,784,440
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			19,465				19,465
Foreign currency translation loss					(2,601)		(2,601)
Stock compensation expense		3,055					3,055
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				(63,252)			$ (63,252)
Common stock repurchases (in shares)	(1,721,015)						(1,721,015)
Cash dividends			(10,588)				$ (10,588)
Balances at Oct. 31, 2022	$ 2,374	161,305	197,567	(83,657)	(5,052)	(797)	271,740
Balances (in shares) at Oct. 31, 2022	13,575,772
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
Net income			7,758				7,758
Foreign currency translation loss					(650)		(650)
Stock compensation expense		1,076					1,076
Common stock repurchases				(10,084)			$ (10,084)
Common stock repurchases (in shares)	(308,423)						(308,423)
Cash dividends			(3,396)				$ (3,396)
Balances at Oct. 31, 2022	$ 2,374	$ 161,305	$ 197,567	$ (83,657)	$ (5,052)	$ (797)	$ 271,740
Balances (in shares) at Oct. 31, 2022	13,575,772