Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands	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, 2016	16,604	3,537	(1,366)
Balance at Jan. 31, 2016	$ 16,000	$ 4,000	$ (18,717,000)	$ 195,420,000	$ (40,983,000)	$ (8,729,000)			$ 127,011,000
Cumulative effect of the adoption of ASU at Jan. 31, 2016				388,000	607,000				995,000
Adjusted balance (in shares) at Jan. 31, 2016	16,604	3,537	(1,366)
Adjusted balance at Jan. 31, 2016	$ 16,000	$ 4,000	$ (18,717,000)	195,808,000	(40,376,000)	(8,729,000)			128,006,000
Net income (loss)					(15,450,000)		$ (13,211,000)	$ (2,239,000)	(15,450,000)
Foreign currency translation adjustment						98,000			98,000
Stock award exercises (in shares)			59
Stock award exercises			$ 795,000	(1,406,000)					(611,000)
Stock-based compensation income tax benefits				89,000					89,000
Stock compensation expense				7,323,000					7,323,000
Dividends declared ($0.288 and $0.24 per Class A and Class B share, respectively)					(5,301,000)				(5,301,000)
Restricted stock (in shares)	1		182
Restricted stock			$ 2,752,000	(4,220,000)					(1,468,000)
Balance (in shares) at Jan. 31, 2017	16,605	3,537	(1,125)
Balance at Jan. 31, 2017	$ 16,000	$ 4,000	$ (15,170,000)	197,594,000	(61,127,000)	(8,631,000)			112,686,000
Net income (loss)					(9,065,000)		(7,762,000)	(1,303,000)	(9,065,000)
Foreign currency translation adjustment						1,803,000			1,803,000
Stock award exercises (in shares)			63
Stock award exercises			$ 1,129,000	(2,118,000)					(989,000)
Stock compensation expense				8,924,000					8,924,000
Dividends declared ($0.288 and $0.24 per Class A and Class B share, respectively)					(5,367,000)				(5,367,000)
Restricted stock (in shares)			170
Restricted stock			$ 1,580,000	(3,944,000)					(2,364,000)
Balance (in shares) at Jan. 31, 2018	16,605	3,537	(892)
Balance at Jan. 31, 2018	$ 16,000	$ 4,000	$ (12,461,000)	200,456,000	(75,559,000)	(6,828,000)			105,628,000
Cumulative effect of the adoption of ASU at Jan. 31, 2018					22,125				22,125
Adjusted balance (in shares) at Jan. 31, 2018	16,605	3,537	(892)
Adjusted balance at Jan. 31, 2018	$ 16,000	$ 4,000	$ (12,461,000)	200,456,000	(53,434,000)	(6,828,000)			127,753,000
Net income (loss)					10,428,000		$ 8,939,000	$ 1,489,000	10,428,000
Foreign currency translation adjustment						(833,000)			(833,000)
Stock award exercises (in shares)			196
Stock award exercises			$ 3,430,000	(7,878,000)					(4,448,000)
Stock compensation expense				10,122,000					10,122,000
Dividends declared ($0.288 and $0.24 per Class A and Class B share, respectively)					(5,479,000)				(5,479,000)
Restricted stock (in shares)			181
Restricted stock			$ 1,681,000	(5,977,000)					(4,296,000)
Balance (in shares) at Jan. 31, 2019	16,605	3,537	(515)
Balance at Jan. 31, 2019	$ 16,000	$ 4,000	$ (7,350,000)	$ 196,723,000	$ (48,485,000)	$ (7,661,000)			$ 133,247,000