Quarterly report pursuant to Section 13 or 15(d)

Supplemental Disclosures - Schedule of Cash, Cash Equivalents and Restricted Cash (Details)

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Supplemental Disclosures - Schedule of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Sep. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]        
Cash and cash equivalents $ 101,683 $ 71,737 $ 126,257  
Restricted cash (recorded within "prepaid expenses and other current assets") 18,282 16,824 12,485  
Cash, cash equivalents, and restricted cash $ 119,965 $ 88,561 $ 138,742 $ 116,492