Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member] Common Class A [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member] Common Class B [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Treasury Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Common Stock [Member] Common Class A [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Common Stock [Member] Common Class B [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Treasury Stock [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [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, 2017															16,605	3,537	(1,125)
Balance at Jan. 31, 2017															$ 16	$ 4	$ (15,170)	$ 197,594	$ (61,127)	$ (8,631)			$ 112,686
Net (loss) income																			(9,065)		$ (7,762)	$ (1,303)	(9,065)
Foreign currency translation adjustments																				1,803			1,803
Stock award exercises (in shares)																	63
Stock award exercises																	$ 1,129	(2,118)					(989)
Stock compensation expense																		8,924					8,924
Dividends declared ($0.288 and $0.24 per Class A and Class B share, respectively)																			(5,367)				(5,367)
Restricted stock (in shares)																	170
Restricted stock																	$ 1,580	(3,944)					(2,364)
Balance at Jan. 31, 2018					$ 22,125		$ 22,125	$ 16	$ 4	$ (12,461)	$ 200,456	$ (53,434)	$ (6,828)	$ 127,753	$ 16	$ 4	$ (12,461)	200,456	(75,559)	(6,828)			105,628
Balance (in shares) at Jan. 31, 2018															16,605	3,537	(892)
Net (loss) income																			10,428		8,939	1,489	10,428
Foreign currency translation adjustments																				(833)			(833)
Stock award exercises (in shares)																	196
Stock award exercises																	$ 3,430	(7,878)					(4,448)
Stock compensation expense																		10,122					10,122
Dividends declared ($0.288 and $0.24 per Class A and Class B share, respectively)																			(5,479)				(5,479)
Restricted stock (in shares)																	181
Restricted stock																	$ 1,681	(5,977)					(4,296)
Adjusted balance (in shares) at Jan. 31, 2018								16,605	3,537	(892)
Balance at Jan. 31, 2019															$ 16	$ 4	$ (7,350)	196,723	(48,485)	(7,661)			133,247
Balance (in shares) at Jan. 31, 2019															16,605	3,537	(515)
Net (loss) income																			(15,949)		$ (13,692)	$ (2,257)	(15,949)
Foreign currency translation adjustments																				(684)			(684)
Stock award exercises (in shares)															492		126
Stock award exercises															$ 1		$ 1,943	(4,615)					(2,671)
Stock compensation expense																		11,354					11,354
Dividends declared ($0.288 and $0.24 per Class A and Class B share, respectively)																			(5,617)				(5,617)
Restricted stock (in shares)															12		173
Restricted stock																	$ 2,181	(5,638)					(3,457)
Balance at Jan. 31, 2020					$ (158)		$ (158)								$ 17	$ 4	$ (3,226)	$ 197,824	$ (70,209)	$ (8,345)			$ 116,065
Balance (in shares) at Jan. 31, 2020															17,109	3,537	(216)