Commitments and Contingencies - Additional Information (Details) - USD ($)	1 Months Ended		3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jan. 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Loss Contingencies [Line Items]
Minimum lease payments			$ 10,710,000		$ 10,710,000
Rent expense			800,000	$ 400,000	1,700,000	$ 1,200,000
Revolving Credit Facility | secured Debt
Loss Contingencies [Line Items]
Line of credit drawn amount			0		0
Revolving Credit Facility | secured Debt | Western Alliance Bank
Loss Contingencies [Line Items]
Line of credit facility			$ 15,000,000		$ 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%
Massachusetts
Loss Contingencies [Line Items]
Minimum lease payments							$ 7,800,000
Florida
Loss Contingencies [Line Items]
Minimum lease payments		$ 1,400,000
Operating lease, term of contract		7 years
China
Loss Contingencies [Line Items]
Increase in future minimum payments	$ 800,000
United Kingdom
Loss Contingencies [Line Items]
Increase in future minimum payments	$ 200,000