Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Common Class A [Member]	Common Class B [Member]	Total
Balance (in shares) at Jan. 31, 2019			16,605	3,537	(515)
Balance at Jan. 31, 2019	$ (173)	$ (173)	$ 16	$ 4	$ (7,350)	$ 196,723	$ (48,485)	$ (7,661)			$ 133,247
Net income (loss)							(16,359)		$ (14,045)	$ (2,314)	(16,359)
Foreign currency translation adjustments								(278)			(278)
Stock award exercises					$ 1,943	(2,164)					(220)
Stock compensation expense						8,396					8,396
Dividends declared ($0.216 and $0.18 per Class A and Class B share, respectively)							(4,187)				(4,187)
Restricted stock (in shares)					173
Restricted stock					$ 2,182	(5,534)					(3,352)
Stock award exercises (in shares)					126
Balance (in shares) at Oct. 31, 2019			17,030	3,537	(216)
Balance at Oct. 31, 2019			$ 17	$ 4	$ (3,225)	197,421	(69,204)	(7,939)			117,074
Balance (in shares) at Jan. 31, 2020			17,109	3,537	(216)
Balance at Jan. 31, 2020			$ 17	$ 4	$ (3,226)	197,824	(70,209)	(8,345)			116,065
Net income (loss)			$ 0	$ 0	$ 0	0	2,863	0	$ 2,470	$ 393	2,863
Foreign currency translation adjustments								(643)			(643)
Stock award exercises						(2,590)					(2,437)
Stock compensation expense						10,126					10,126
Dividends declared ($0.216 and $0.18 per Class A and Class B share, respectively)							(4,330)				(4,330)
Restricted stock (in shares)			186
Restricted stock						(3,528)					(3,528)
Balance (in shares) at Oct. 31, 2020			17,368	3,537	(207)
Balance at Oct. 31, 2020			$ 17	$ 4	$ (3,073)	$ 201,832	$ (71,676)	$ (8,988)			$ 118,116