Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Common Class A [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	10,000,000	10,000,000
Common stock, issued (in shares)	3,283,177	3,015,099
Common stock, outstanding (in shares)	3,283,177	3,015,099
Common Class B [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	250,000	250,000
Common stock, issued (in shares)	0	232,780
Common stock, outstanding (in shares)	0	232,780
Allowance for doubtful accounts	$ 217	$ 258