Goodwill and Intangible Assets Net - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Dispose, impair or recognition of additional goodwill	$ 0
Impairment charges on goodwill	0
Impairment losses recognized related to the acquired intangible assets	0	$ 0	$ 0
Annual amortization expense of the intangible assets, 2020	$ 100,000