CONDENSED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)	Sep. 30, 2012	Dec. 31, 2011	Jul. 08, 2011
Stockholders' equity (2011 restated to reflect a 1-for-7 reverse common stock split, see Note 1):
Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, shares authorized (in shares)	5,000,000	5,000,000
Series A Junior Participating Preferred Stock, shares authorized (in shares)	25,000	25,000	15,000
Preferred Stock, shares issued (in shares)	0	0
Preferred Stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	250,000,000	250,000,000	175,000,000
Common stock, shares issued (in shares)	21,307,916	21,294,413
Common stock, shares outstanding (in shares)	21,307,916	21,294,413
Treasury stock (in shares)	90,546	90,546