Summary of Significant Accounting Policies - Additional Information (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2021 FinancialInstitution Customer	Dec. 31, 2020 FinancialInstitution
Accounting Standards Update 2019-12
Summary Of Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]	true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2021
Change in accounting principle, accounting standards update, immaterial effect [true false]	true
Accounting Standards Update 2020-04
Summary Of Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]	true
Change in accounting principle, accounting standards update, adoption date	Mar. 12, 2020
Customer Concentration Risk | Net Accounts Receivable
Summary Of Significant Accounting Policies [Line Items]
Number of customers accounted for 10% or more | Customer	0
Customer 1
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents balance percentage	33.00%	46.00%
Number of financial institutions which manage cash balances	2	2
Customer 2
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents balance percentage	28.00%	26.00%
Number of financial institutions which manage cash balances	2	2
Customer H | Customer Concentration Risk | Net Accounts Receivable
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage		11.00%