CONDENSED CONSOLDIATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 514	$ 547
Preferred stock, par value
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	6,972,515	6,901,887
Common stock, shares outstanding	6,972,515	6,901,887