CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Gain (Loss)	Non-controlling Interests	Total
Balances at Jan. 31, 2018	$ 2,336	$ 143,215	$ 211,112	$ 1,422	$ 43	$ 358,128
Balances (in shares) at Jan. 31, 2018	15,567,719
Adoption of ASC Topic 606 | Impact of the Adoption of ASC Topic 606			38			38
Net income (loss)			52,036		(167)	51,869
Foreign currency translation gain (loss)				(1,768)		(1,768)
Stock compensation expense		1,645				1,645
Stock option exercises	$ 1	101				$ 102
Stock option exercises (in shares)	6,150					6,000
Cash distributions to joint venture partner					(72)	$ (72)
Cash dividends			(15,570)			(15,570)
Balances at Jan. 31, 2019	$ 2,337	144,961	247,616	(346)	(196)	394,372
Balances (in shares) at Jan. 31, 2019	15,573,869
Net income (loss)			(42,689)		1,977	(40,712)
Foreign currency translation gain (loss)				(770)		(770)
Stock compensation expense		2,131				2,131
Stock option exercises	$ 9	1,621				$ 1,630
Stock option exercises (in shares)	61,100					61,000
Cash dividends			(15,621)			$ (15,621)
Balances at Jan. 31, 2020	$ 2,346	148,713	189,306	(1,116)	1,781	341,030
Balances (in shares) at Jan. 31, 2020	15,634,969
Net income (loss)			23,851		(40)	23,811
Foreign currency translation gain (loss)				35		35
Stock compensation expense		2,938				2,938
Stock option exercises	$ 10	1,631				$ 1,641
Stock option exercises (in shares)	68,000					68,000
Cash dividends			(47,047)			$ (47,047)
Balances at Jan. 31, 2021	$ 2,356	$ 153,282	$ 166,110	$ (1,081)	$ 1,741	$ 322,408
Balances (in shares) at Jan. 31, 2021	15,702,969