CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Gain	Non-controlling Interests	Total
Balances at Jan. 31, 2017	$ 2,319	$ 135,426	$ 154,649	$ (762)	$ 937	$ 292,569
Balances (in shares) at Jan. 31, 2017	15,458,219
Net (loss) income			72,011		335	72,346
Foreign currency translation gain (loss)				2,184		2,184
Stock compensation expense		4,651				4,651
Stock option exercises	$ 17	3,138				$ 3,155
Stock option exercises (in shares)	109,500					110,000
Cash dividends			(15,548)			$ (15,548)
Distributions to joint venture partners					(1,229)	(1,229)
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 (Note 1)			38			38
Net (loss) income			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 dividends			(15,570)			$ (15,570)
Distributions to joint venture partners					(72)	(72)
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 (loss) income			(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