Condensed Consolidated Balance Sheets [Parenthetical] - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Allowance for doubtful accounts	$ 575	$ 385
Preferred stock, par value (in dollars per share)	$ 0.15	$ 0.15
Preferred stock, shares authorized	1,500,000	1,500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.15	$ 0.15
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	10,519,728	10,519,728
Common stock, shares outstanding	10,519,728	10,519,728