Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands			12 Months Ended
	Jul. 26, 2018	Mar. 15, 2017	Dec. 31, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Amount award to other party	$ 1,000
Stock issued during period, litigation settlement (in shares)	500,000
Additional amount awarded to other party, within 12 months	$ 1,000
Additional amount awarded to other party, within 24 months	$ 1,000
Extinguishment of acquisition-related liabilities			$ 0	$ 17,174
Contingent consideration, liability, current			$ 1,000
Former stockholders of RER
Loss Contingencies [Line Items]
Stock issued during period, shares, acquisitions (in shares)		973,333