Intangible Assets - Summary of Components of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 18,004	$ 15,426
Less: accumulated amortization	5,507	3,852
Intangible assets, net	12,497	11,574
Patents [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	8,902	7,227
In-Licensed Rights [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	8,073	7,573
Software Licenses [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 1,029	$ 626