Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [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, 2018			16,605	3,537	(892)					16,605	3,537	(892)
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
Net income (loss)														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														(5,479)				(5,479)
Restricted stock (in shares)												181
Restricted stock												$ 1,681	(5,977)					(4,296)
Balance (in shares) at Jan. 31, 2019										16,605	3,537	(515)
Balance at Jan. 31, 2019	$ (158)	$ (158)								$ 16	$ 4	$ (7,350)	196,723	(48,485)	(7,661)			133,247
Net income (loss)														(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														(5,617)	0			(5,617)
Restricted stock (in shares)										12		173
Restricted stock												$ 2,181	(5,638)					(3,457)
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)														11,065		$ 9,541	$ 1,524	11,065
Foreign currency translation adjustments															157			157
Stock award exercises (in shares)										75		9
Stock award exercises												$ 153	(2,618)					(2,465)
Stock compensation expense													14,192					14,192
Dividends declared														(5,780)	0			(5,780)
Restricted stock (in shares)										191
Restricted stock													(3,768)					(3,768)
Balance (in shares) at Jan. 31, 2021										17,375	3,537	(207)
Balance at Jan. 31, 2021										$ 17	$ 4	$ (3,073)	$ 205,630	$ (64,924)	$ (8,188)			$ 129,466