Balance Sheet Parenthetical (USD $)	Jun. 30, 2011	Dec. 31, 2010
Current Assets:
Allowance for doubtful accounts	$ 0	$ 0
Stockholders' Equity:
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	27,035,073	27,017,165
Common stock, shares outstanding	26,717,341	27,004,934
Treasury stock, shares	317,731	12,231