Stockholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended		3 Months Ended	1 Months Ended	3 Months Ended
	Nov. 30, 2012	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Officer	Jan. 31, 2012 Anomalous	Mar. 31, 2013 Anomalous	Mar. 31, 2012 Anomalous
Common Stock
Common stock, par value (in dollars per share)		$ 0.0001	$ 0.0001
Common stock, shares authorized		150,000,000	150,000,000
Common stock, shares issued		37,508,169	37,613,327
Common stock, shares outstanding		37,508,169	37,613,327
Unregistered shares of common stock issued as a consideration					165,775		165,775
Unvested and unregistered shares of common stock with vesting based upon achievement of revenue targets					132,617		132,617
Unvested and unregistered shares of common stock cancelled and retired						132,617
Shares issued				5,991
Authorized amount of shares repurchased	$ 20
Shares repurchased		120,000
Average price of shares repurchased and retired (in dollars per share)		$ 12.82
Amount of shares repurchased and retired		$ 1.5
Preferred Stock
Preferred stock, par value (in dollars per share)		$ 0.0001	$ 0.0001
Preferred stock, shares authorized		5,000,000	5,000,000
Preferred stock, shares issued		0	0
Preferred stock, shares outstanding		0	0