Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, share authorized	5,000	5,000
Preferred stock, share outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, share authorized	40,000,000	40,000,000
Common stock, share issued	23,162,332	23,108,082
Common stock, share outstanding	23,162,332	23,108,082