Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Oct. 31, 2016	Jan. 31, 2016
Common Class A [Member]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	71,000,000	71,000,000
Common stock, issued (in shares)	16,605,173	16,603,729
Common Class B [Member]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	4,000,000	4,000,000
Common stock, issued (in shares)	3,537,380	3,537,366
Accounts receivable, net of allowances	$ 2,298	$ 2,642
Preferred stock, par value (in dollars per share)	$ 0.001
Preferred stock, authorized (in shares)	5,000,000
Preferred stock, issued (in shares)	0
Preferred stock, outstanding (in shares)	0
Treasury stock (in shares)	1,153,155	1,365,885