CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
ASSETS
Accounts receivable, allowance for doubtful accounts	$ 463	$ 261
Shareholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	99,000,000.0	99,000,000
Common stock, shares issued (in shares)	2,758,275	2,773,972
Common stock, shares outstanding (in shares)	2,688,790	2,682,078
Treasury stock, shares (in shares)	69,485	91,894