Commitments and Contingencies - Additional Information (Details) - USD ($) |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2020 |
Dec. 31, 2019 |
|
| Commitments And Contingencies [Line Items] | ||
| Letters of credit outstanding | $ 30,900,000 | $ 31,800,000 |
| Letters of credit expiration year | 2030 | |
| Indemnification liabilities | $ 0 | |
| Manufacturing | ||
| Commitments And Contingencies [Line Items] | ||
| Purchase commitments for inventory and license | 226,800,000 | |
| Manufacturing | Accrued Liabilities | ||
| Commitments And Contingencies [Line Items] | ||
| Loss on purchase obligation for inventory | 300,000 | |
| Content License | Accrued Liabilities | ||
| Commitments And Contingencies [Line Items] | ||
| Purchase commitments for inventory and license | 4,000,000.0 | $ 1,700,000 |
| Content Publishers | ||
| Commitments And Contingencies [Line Items] | ||
| Purchase commitments for inventory and license | $ 44,600,000 |