Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Reserves for accounts receivable	$ 315	$ 360
Shareholders' equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares (in shares)	40,000,000	40,000,000
Common stock, shares issued (in shares)	17,371,153	17,386,853
Common stock, shares outstanding (in shares)	17,371,153	17,386,853