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Operating Expenses (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Operating Expenses [Line Items]    
Research and development $ 2,050 $ 3,269
Total operating expenses 44,457 60,458
Operating Expense [Member]    
Operating Expenses [Line Items]    
Compensation and employee benefits 19,891 18,018
Selling and marketing 13,865 29,742
General and administrative 8,651 9,429
Research and development 2,050 3,269
Total operating expenses $ 44,457 $ 60,458