Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
CONSOLIDATED BALANCE SHEETS [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 473	$ 547
Preferred stock, par value (in usd per share)
Preferred stock, shares authorized, shares	5,000,000	5,000,000
Preferred stock, shares outstanding, shares	0	0
Common stock, par value (in usd per share)
Common stock, shares authorized, shares	25,000,000	25,000,000
Common stock, shares issued, shares	6,979,686	6,901,887
Common stock, shares outstanding, shares	6,979,686	6,901,887