Commitments and Contingencies (Details) (USD $)	1 Months Ended
	May 31, 2014	Jun. 30, 2014
Leases
Future minimum lease payments		$ 19,539,000
Future minimum operating lease payments
2014 (remaining 6 months)		2,243,000
2015		4,474,000
2016		4,638,000
2017		4,742,000
2018		3,237,000
Thereafter		205,000
Total		19,539,000
Contractual obligation under the hosting service agreement	1,800,000
Term of the hosting service agreement	36 months
San Mateo lease
Leases
Additional area of building space under amended lease agreement (in square feet)	14,864
Increase in future minimum lease payments under amended lease agreement		9,300,000
Atlanta lease
Leases
Area of office space (in square feet)	7,245
Future minimum lease payments	1,100,000
Term of operating lease	66 months
Future minimum operating lease payments
Total	$ 1,100,000