Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019
Summary Of Significant Accounting Policies
Income tax examination, likelihood of settlement, description	The amount of the benefit that may be recognized is the largest amount that has a greater than 50% likelihood of being realized upon ultimate settlement.
Minimum
Summary Of Significant Accounting Policies
Property and equipment, estimated useful life	3 years
Income tax examination, likelihood of settlement, percentage	50.00%
Maximum
Summary Of Significant Accounting Policies
Property and equipment, estimated useful life	5 years