Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Balance Sheets [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	14,743,000	15,847,000
Common stock, shares outstanding	14,743,000	15,847,000