Intangible Assets and Goodwill - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 13,156	$ 4,735
Accumulated amortization	(3,150)	(2,049)
Net value	$ 10,006	2,686
Patents
Finite-Lived Intangible Assets [Line Items]
Average amortization period	5 years
Gross carrying amount	$ 5,956	4,735
Development programs
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 7,200	$ 0
Minimum
Finite-Lived Intangible Assets [Line Items]
Average amortization period	2 years
Minimum | Development programs
Finite-Lived Intangible Assets [Line Items]
Average amortization period	2 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Average amortization period	5 years
Maximum | Development programs
Finite-Lived Intangible Assets [Line Items]
Average amortization period	4 years