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Stockholders' Equity - Schedule of Recognized Stock-Based Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Total Stock-Based Compensation Expense $ 9,374 $ 9,061
Subscriber Related [Member]    
Total Stock-Based Compensation Expense 14
Sales and Marketing [Member]    
Total Stock-Based Compensation Expense 713
Technology and Development [Member]    
Total Stock-Based Compensation Expense 2,070
General and Administrative [Member]    
Total Stock-Based Compensation Expense $ 6,577 $ 9,061