Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease expense	$ 1,914	$ 1,909	$ 3,890	$ 3,939
Weighted-average remaining lease term, operating leases	6 years 5 months 9 days		6 years 5 months 9 days		6 years 8 months 15 days
Weighted-average remaining lease term, financing leases	4 years 1 month 24 days		4 years 1 month 24 days		4 years 6 months 15 days
Weighted-average discount rate for operating leases	7.20%		7.20%		7.20%
Weighted-average discount rate for financing leases	6.80%		6.80%		6.80%
Cost of Sales
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease expense	$ 1,600	1,800	$ 3,400	3,600
Research, Development And Engineering Expense
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease expense	100	100	200	200
Selling, General and Administrative Expenses
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease expense	100	100	200	100
Interest Expense
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease expense	$ 100	$ 100	$ 100	$ 100