Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Shareholders' equity:
Common stock, par value (in dollars per share)	$ 0.02	$ 0.02
Common stock, authorized shares (in shares)	28,000,000	28,000,000
Common stock, shares issued (in shares)	12,860,023	12,860,023
Preferred stock, par value (in dollars per share)	$ 0.02	$ 0.02
Preferred stock, authorized shares (in shares)	2,000,000	2,000,000
Preferred stock, shares issued (in shares)	0	0
Treasury stock, at cost (in shares)	11,168	101,622