CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Property and equipment, accumulated depreciation	$ 5,354	$ 4,590
Common stock, par value (dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	9,986,076	9,801,938
Common stock, shares outstanding	8,884,421	8,810,375
Treasury stock, shares	1,101,655	991,563