Stockholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended	6 Months Ended
	Aug. 04, 2011	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Stockholders' Equity (Textual) [Abstract]
Common stock reserved for issuance upon exercise of outstanding common stock options		2,120,944	2,120,944
Common stock reserved for future grants of stock options		2,213,279	2,213,279
Common stock reserved for future exercise of outstanding warrants		281,561	281,561
Common stock warrants exercised		0
Common stock warrants outstanding		281,561	281,561	281,561
Stock repurchase program, authorized amount	$ 25.0
Stock repurchase program, period			2 years
Repurchase of company shares		0	0