Commitment and Contingencies - Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) item	Dec. 31, 2015 USD ($) item	Dec. 31, 2014 USD ($)
As Lessor
2016	$ 16,872
2017	16,872
2018	16,872
2019	15,715
2020	11,480
Thereafter	2,872
Total future minimum lease payments	80,683
As Lessee
2016	12,350
2017	12,125
2018	10,936
2019	9,802
2020	5,535
Thereafter	759
Total future minimum lease payments	51,507
Rental expense for all operating lease	13,200	$ 6,200	$ 1,500
Prepaid Rent And Security Deposit	11,800	12,100
Capital Leases, Future Minimum Payments, Net Present Value [Abstract]
2017	16,313
2018	10,665
2019	3,436
2020	3,436
2021	3,436
Thereafter	1,689
Total future minimum payments: Total Payments	38,975
2017	4,205
2018	2,064
2019	1,435
2020	1,083
2021	674
Thereafter	151
Total future imputed interest	9,612
2017	12,108
2018	8,601
2019	2,001
2020	2,353
2021	2,762
Thereafter	1,538
Total future minimum payments: Net Present Value	29,363
Cash received for future services	12,800	15,100
Cash held in escrow deposit	53,600
Letter of credit with Silicon Valley Bank	1,000
Prepaid and Other Current Assets
As Lessee
Prepaid Rent And Security Deposit	1,900	2,000
Other Assets.
As Lessee
Prepaid Rent And Security Deposit	9,900	10,100
Latham, New York
Capital Leases, Future Minimum Payments, Net Present Value [Abstract]
Total future minimum payments: Net Present Value	$ 2,400	$ 2,500
Accounts receivable. | Credit risk | Customers
Capital Leases, Future Minimum Payments, Net Present Value [Abstract]
Number of customers | item	2	2
Concentration risk (as a percent)	59.90%	50.90%
Accounts receivable. | Credit risk | Customer one
Capital Leases, Future Minimum Payments, Net Present Value [Abstract]
Concentration risk (as a percent)	40.00%	38.50%
Accounts receivable. | Credit risk | Customer two
Capital Leases, Future Minimum Payments, Net Present Value [Abstract]
Concentration risk (as a percent)	19.90%
Accounts receivable. | Credit risk | Customer four
Capital Leases, Future Minimum Payments, Net Present Value [Abstract]
Concentration risk (as a percent)		12.40%
Revenues. | Customer concentration | Customers
Capital Leases, Future Minimum Payments, Net Present Value [Abstract]
Concentration risk (as a percent)			37.20%
Revenues. | Customer concentration | Walmart
Capital Leases, Future Minimum Payments, Net Present Value [Abstract]
Concentration risk (as a percent)	34.10%	56.70%	24.10%
Revenues. | Customer concentration | Volkswagen
Capital Leases, Future Minimum Payments, Net Present Value [Abstract]
Concentration risk (as a percent)			13.10%