Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000	1,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (usd per share)	$ 0.0017	$ 0.0017
Common stock, shares authorized	16,000	16,000
Common stock, shares issued	8,128	8,061
Common stock, shares outstanding	7,520	7,594
Treasury stock, shares	608	467