Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
ROU assets, net	$ 22,598	$ 22,598
Operating lease liabilities	23,387	23,387
Lease expense	1,909	3,939
Rent expense under operating leases	$ 1,300	$ 2,400
Weighted-average remaining lease term, financing lease	6.80%	6.80%
Weighted-average remaining lease term, operating lease	7 years	7 years
Weighted-average discount rate for financing lease	4 years 11 months 26 days	4 years 11 months 26 days
Weighted-average discount rate for operating lease	7.20%	7.20%
Cost of Sales
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease expense	$ 1,800	$ 3,600
Interest Expense
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease expense		100
Research, Development And Engineering Expense
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease expense		200
Selling, General and Administrative Expenses
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease expense		$ 100
ASC 842
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
ROU assets, net			$ 24,600
Operating lease liabilities			$ 25,100