Commitments and Contingencies - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended
	Dec. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Loss Contingencies [Line Items]
Increase in future minimum payments	$ 8,000,000
Future minimum sublease income		$ 100,000
Rent expense		400,000	$ 300,000
Revolving Credit Facility | secured Debt
Loss Contingencies [Line Items]
Line of credit drawn amount		0
Revolving Credit Facility | secured Debt | Western Alliance Bank
Loss Contingencies [Line Items]
Line of credit facility		$ 15,000,000
Line of credit facility, expiration date		Jun. 30, 2018
Revolving Credit Facility | secured Debt | Western Alliance Bank | Prime Rate
Loss Contingencies [Line Items]
Line of credit, interest rate		0.75%