Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 167	$ 135
Convertible preferred stock, par value (USD per share)	$ 0.0001	$ 0.0001
Convertible preferred stock, shares authorized	1,000,000	1,000,000
Convertible preferred stock, shares issued	0	0
Convertible preferred stock, shares outstanding	0	0
Common stock, par value (USD per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	11,200,000	11,200,000
Common stock, shares issued	4,958,000	4,895,000
Common stock, shares outstanding	4,958,000	4,895,000