Stockholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended	9 Months Ended
	Aug. 04, 2011	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2011
Stockholders' Equity (Textual) [Abstract]
Common stock reserved for future grants of stock options		2,142,719	2,142,719
Common stock reserved for issuance upon exercise of outstanding common stock options		2,190,004	2,190,004
Common stock reserved for future exercise of outstanding warrants		267,826	267,826
Common stock warrants exercised			13,735
Common stock warrants outstanding		267,826	267,826	281,561
Stock repurchase program, authorized amount	$ 25.0
Stock repurchase program, period			2 years
Repurchase of company shares		0	0
Issuance of shares of common stock to warrant holder			2,188