CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 395	$ 205
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	18,919,000	18,757,000
Common stock, shares outstanding	18,919,000	18,757,000