CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
allowance for doubtful accounts	$ 20	$ 90
Preferred stock par value	$ 0.01	$ 0.01
Preferred stock shares authorized	5,000,000	5,000,000
Preferred stock shares issued	0	0
Preferred stock shares outstanding	0	0
Common stock par value	$ 0.01	$ 0.01
Common stock shares authorized	20,000,000	20,000,000
Common stock shares issued	5,210,448	5,094,473
Common stock shares outstanding	5,210,448	5,094,473