Summary of Significant Accounting Policies - Schedule of Major Customers that Represented More Than 10% of Total Revenues (Detail) - Customer Concentration Risk - Sales Revenue, Net	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Distributor A
Revenue, Major Customer [Line Items]
Concentration risk, percentage	38.00%	37.00%	32.00%
Distributor B
Revenue, Major Customer [Line Items]
Concentration risk, percentage	23.00%	17.00%	10.00%
Distributor C
Revenue, Major Customer [Line Items]
Concentration risk, percentage	12.00%	14.00%	15.00%
Distributor D
Revenue, Major Customer [Line Items]
Concentration risk, percentage	12.00%	12.00%	15.00%
Distributor E
Revenue, Major Customer [Line Items]
Concentration risk, percentage	11.00%	12.00%	12.00%
Distributor F
Revenue, Major Customer [Line Items]
Concentration risk, percentage	0.00%	5.00%	11.00%