Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Shareholders' equity:
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	19,850,879	19,682,506
Capital in excess of par value, amount received on warrants issued	$ 1,034	$ 1,034
Capital in excess of par value, warrants based shares	485,309	485,309