Other Assets - Patent Licenses (Details) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Apr. 30, 2020 USD ($) patent	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Finite-Lived Intangible Assets [Line Items]
Finite-lived, intangible assets, net		$ 95,402		$ 95,402		$ 103,438
Finite-lived intangible assets, gross		157,811		157,811		157,811
Amortization on patents and tooling				401	$ 334
Patent Licenses
Finite-Lived Intangible Assets [Line Items]
Patents purchased | patent	30
Assets acquired	$ 900
Finite-lived, intangible assets, net		3,100		3,100		2,400
Finite-lived intangible assets, gross		6,800		6,800
Patent Licenses | Cost of SaaS and License Revenue
Finite-Lived Intangible Assets [Line Items]
Amortization on patents and tooling		100	$ 100	200	200
Patent Licenses | Amortization and depreciation expense
Finite-Lived Intangible Assets [Line Items]
Amortization on patents and tooling		100	$ 100	$ 100	$ 100
Patent Licenses | Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life				3 years
Patent Licenses | Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life				12 years
Other Current Assets | Patent Licenses
Finite-Lived Intangible Assets [Line Items]
Finite-lived, intangible assets, net		700		$ 700		500
Other Assets | Patent Licenses
Finite-Lived Intangible Assets [Line Items]
Finite-lived, intangible assets, net		$ 2,400		$ 2,400		$ 1,900