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Basis of Presentation and Significant Accounting Policies - Concentration of Risk (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 USD ($) customer | Mar. 31, 2021 customer | Dec. 31, 2021 customer
Concentration of Risk |  |  |
Trade receivable, net | $ | $ 0.0 |  |
Customer Concentration Risk | Revenues. |  |  |
Concentration of Risk |  |  |
Number of major partners | 3 |  |
Customer Concentration Risk | Revenues. | Partner 1 |  |  |
Concentration of Risk |  |  |
Number of major partners |  | 1 |
Concentration risk (as a percent) | 64.00% | 95.00% |
Customer Concentration Risk | Revenues. | Partner 2 |  |  |
Concentration of Risk |  |  |
Concentration risk (as a percent) | 24.00% |  |
Customer Concentration Risk | Revenues. | Partner 3 |  |  |
Concentration of Risk |  |  |
Concentration risk (as a percent) | 11.00% |  |
Credit Concentration Risk | Trade Receivables [Member] | Partner 1 |  |  |
Concentration of Risk |  |  |
Number of major partners |  |  | 1
Concentration risk (as a percent) |  |  | 100.00%

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