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Summary of Significant Accounting Policies - Concentration of Credit Risk (Details)
12 Months Ended
Dec. 31, 2021
USD ($)
fund
bank
Cash and Cash Equivalents [Line Items]  
Number of "Triple A" rated money market funds with cash, cash equivalent and restricted cash held on deposit | fund 4
Number of global banks with cash, cash equivalent and restricted cash held on deposit | bank 1
Maximum investment limit in any one financial institution | $ $ 75,000,000
Investment in single mutual fund | Credit Concentration Risk  
Cash and Cash Equivalents [Line Items]  
Threshold percentage 1.00%