Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - 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]	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								$ 16	$ 4	$ (7,350)	$ 196,723	$ (48,485)	$ (7,661)			$ 133,247
Net loss												(3,234)		$ (2,774)	$ (460)	(3,234)
Foreign currency translation adjustments													(263)			(263)
Stock award exercises (in shares)										3
Stock award exercises										$ 87	(144)					(57)
Stock compensation expense											2,304					2,304
Dividends declared ($0.072 and $0.06 per Class A and Class B share, respectively)												(1,374)				(1,374)
Restricted stock (in shares)										7
Restricted stock										$ 41	(219)					(178)
Balance at Apr. 30, 2019					$ (173)		$ (173)	$ 16	$ 4	$ (7,222)	198,664	(53,266)	(7,924)			130,272
Balance (in shares) at Apr. 30, 2019								16,605	3,537	(505)
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 loss												(410)		$ (353)	$ (57)	(410)
Foreign currency translation adjustments													(2,655)			(2,655)
Stock award exercises (in shares)
Stock award exercises											(11)					(11)
Stock compensation expense											2,405					2,405
Dividends declared ($0.072 and $0.06 per Class A and Class B share, respectively)												(1,431)				(1,431)
Restricted stock (in shares)								4
Restricted stock											(92)					(92)
Balance at Apr. 30, 2020								$ 17	$ 4	$ (3,226)	$ 200,126	$ (72,050)	$ (11,000)			$ 113,871
Balance (in shares) at Apr. 30, 2020								17,113	3,537	(216)