Commitments and Contingencies (Details)	1 Months Ended			3 Months Ended
	Nov. 30, 2016 USD ($)	Oct. 31, 2016 ft²	Oct. 31, 2015 USD ($)	Mar. 31, 2017 USD ($) ft² lease item	Mar. 31, 2016 USD ($)
Future minimum lease payments
2017 (remaining 9 months)				$ 5,051,000
2018				7,343,000
2019				7,025,000
2020				7,106,000
2021				7,297,000
2022 and thereafter				20,991,000
Total future minimum lease payment				54,813,000
Rent expense				$ 1,700,000	$ 1,300,000
Corporate Headquarters Lease
Operating Leases
Office space (area) | ft²				104,000
Security Deposit	$ 100,000			$ 700,000
Term of lease				84 months
Security deposit	100,000			$ 700,000
Number of office space locations | item				2
"First Space" Sublease
Operating Leases
Office space (area) | ft²				88,000
Monthly base rent				$ 309,372
"Second Space" Sublease
Operating Leases
Office space (area) | ft²				16,000
Monthly base rent				$ 60,730
Corporate Headquarters Sublease
Operating Leases
Office space (area) | ft²		13,000
Monthly base rent	$ 49,140
Term of lease		28 months
Percentage of annual increase in monthly base rent	3.00%
Austin TX, Long-term Lease
Operating Leases
Office space (area) | ft²				94,000
Monthly base rent				$ 100,000
Security Deposit				$ 400,000
Term of lease				132 months
Maximum monthly base rent after escalation				$ 200,000
Security deposit				400,000
Allowance for leasehold improvements				7,800,000
Austin TX, Short-term Lease
Operating Leases
Monthly base rent			$ 12,900
Security Deposit			$ 12,900
Term of lease			1 year
Security deposit			$ 12,900
Reimbursement from landlord				$ 6,000,000
First space sublease terminated
Operating Leases
Number of subleases | lease				2
Number of lessors | item				2
First space sublease terminated, phase one
Operating Leases
Office space (area) | ft²				61,000
Restricted cash				$ 800,000
First space sublease terminated, phase two
Operating Leases
Office space (area) | ft²				27,000
Restricted cash				$ 300,000