The Company and Summary of Significant Accounting Policies - Provision for Credit Losses and Customer Accounts and Funds Receivable (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Credit-related loss	$ 0	$ 0
Minimum
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts receivable, number of days outstanding	0 days
Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts receivable, number of days outstanding	180 days