Condensed Consolidated Balance Sheets Unaudited (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Accounts receivable, allowance for doubtful accounts (in Dollars)	$ 335	$ 325
Preferred stock par value (in Dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Common stock, authorized	40,000,000	40,000,000
Common stock, issued	21,584,582	21,383,467
Treasury stock, shares	403,581	403,581