Goodwill, In-Process Research and Development and Intellectual Property - Summary of Gross Intellectual Property, Accumulated Amortization, and Net Intellectual Property (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Developed Technology
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 68,838	$ 66,413
Accumulated amortization	(38,802)	(36,918)
Transfer to developed technology	(2,389)	(1,208)
Net carrying amount	27,647	28,287
Technology and Patents Purchased
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	400	400
Accumulated amortization	(121)	(112)
Transfer to developed technology	13	21
Net carrying amount	292	309
Intellectual Property
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	69,238	66,813
Accumulated amortization	(38,923)	(37,030)
Transfer to developed technology	(2,376)	(1,187)
Net carrying amount	$ 27,939	$ 28,596