Summary of Significant Accounting Policies - Schedule of Customers Representing Greater than 10% of Accounts Receivable and Revenue (Detail) - Customer Concentration Risk	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue | Customer A
Concentration Risk [Line Items]
Percentage of concentration risk			16.00%
Revenue | Customer B
Concentration Risk [Line Items]
Percentage of concentration risk			17.00%
Revenue | Customer H
Concentration Risk [Line Items]
Percentage of concentration risk	14.00%
Revenue | Customer I
Concentration Risk [Line Items]
Percentage of concentration risk			17.00%
Revenue | Customer J
Concentration Risk [Line Items]
Percentage of concentration risk			16.00%
Revenue | Customer K
Concentration Risk [Line Items]
Percentage of concentration risk			14.00%
Revenue | Customer L
Concentration Risk [Line Items]
Percentage of concentration risk			10.00%
Accounts Receivable | Customer A
Concentration Risk [Line Items]
Percentage of concentration risk	34.00%
Accounts Receivable | Customer B
Concentration Risk [Line Items]
Percentage of concentration risk	25.00%
Accounts Receivable | Customer C
Concentration Risk [Line Items]
Percentage of concentration risk	15.00%
Accounts Receivable | Customer D
Concentration Risk [Line Items]
Percentage of concentration risk		23.00%
Accounts Receivable | Customer E
Concentration Risk [Line Items]
Percentage of concentration risk		22.00%
Accounts Receivable | Customer F
Concentration Risk [Line Items]
Percentage of concentration risk		19.00%
Accounts Receivable | Customer G
Concentration Risk [Line Items]
Percentage of concentration risk		16.00%
Accounts Receivable | Customer H
Concentration Risk [Line Items]
Percentage of concentration risk		15.00%