Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Schedule of Intangible Asset by Major Class [Line Items]
Intangible Assets, Gross Amount (Excluding Goodwill), Total	$ 6,214	$ 10,797
Finite-Lived Intangible Assets, Accumulated Amortization	$ 4,513	8,841
Patents and licenses, software and hardware designs
Schedule of Intangible Asset by Major Class [Line Items]
Weighted Average Life	6 years
Finite-Lived Intangible Assets, Gross Amount	$ 3,432	5,177
Finite-Lived Intangible Assets, Accumulated Amortization	$ 1,731	3,430
Developed technology
Schedule of Intangible Asset by Major Class [Line Items]
Weighted Average Life	10 years
Finite-Lived Intangible Assets, Gross Amount	$ 2,782	2,782
Finite-Lived Intangible Assets, Accumulated Amortization	$ 2,782	2,573
Customer relationships and non-compete
Schedule of Intangible Asset by Major Class [Line Items]
Weighted Average Life	9 years
Finite-Lived Intangible Assets, Gross Amount		2,838
Finite-Lived Intangible Assets, Accumulated Amortization		$ 2,838