Other Assets - Patent Licenses (Details) $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended
	Oct. 31, 2020 USD ($) patent	Apr. 30, 2020 USD ($) patent	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Finite-Lived Intangible Assets [Line Items]
Finite-lived, intangible assets, net			$ 91,384		$ 91,384		$ 103,438
Finite-lived intangible assets, gross			157,811		157,811		157,811
Amortization on patents and tooling					604	$ 506
Patent Licenses
Finite-Lived Intangible Assets [Line Items]
Patents purchased | patent		30
Assets acquired		$ 900
Finite-lived, intangible assets, net			2,900		2,900		2,400
Finite-lived intangible assets, gross			6,800		6,800
Patent Licenses | Subsequent Event
Finite-Lived Intangible Assets [Line Items]
Patents purchased | patent	1
Assets acquired	$ 200
Patent Licenses | Cost of SaaS and License Revenue
Finite-Lived Intangible Assets [Line Items]
Amortization on patents and tooling			100	$ 100	300	300
Patent Licenses | Amortization and depreciation expense
Finite-Lived Intangible Assets [Line Items]
Amortization on patents and tooling			100	$ 100	$ 200	$ 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			$ 2,200		$ 2,200		$ 1,900