Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Expected Subscriber Fees (Details)

v3.20.4
Summary of Significant Accounting Policies - Expected Subscriber Fees (Details) - Subscriber Accounts
$ in Thousands
Dec. 31, 2020
USD ($)
Finite-Lived Intangible Assets [Line Items]  
2021 $ 183,239
2022 152,775
2023 127,371
2024 106,186
2025 $ 88,518