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2020 Cash Incentive Bonus Plan (Narrative) (Details) - Cash Incentive Bonus Plan [Member] - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021 | Oct. 13, 2020
Cash Incentive Bonus Plan [Line Items] |  |  |
Percentage of each cash bonus award associated with Valuation Milestone subject to adjustment and approval | 58.00% |  |
Payments authorized or made to participants under the Plan | $ 0.0 |  |
First Valuation Milestone [Member] |  |  |
Cash Incentive Bonus Plan [Line Items] |  |  |
Cash bonus award |  |  | $ 7.3
Second Through Eighth Valuation Milestones [Member] |  |  |
Cash Incentive Bonus Plan [Line Items] |  |  |
Compensation expense | 0.0 |  |
Minimum [Member] |  |  |
Cash Incentive Bonus Plan [Line Items] |  |  |
Valuation milestone amount in market capitalization | 200.0 |  |
Minimum [Member] | Exceeds $5 Billion Market Capitalization For No Less Than 20 Consecutive Trading Days [Member] |  |  |
Cash Incentive Bonus Plan [Line Items] |  |  |
Cash bonus award | 139.1 |  |
Minimum [Member] | Second Through Eighth Valuation Milestones [Member] |  |  |
Cash Incentive Bonus Plan [Line Items] |  |  |
Cash bonus award |  | $ 93.7 |
Maximum [Member] |  |  |
Cash Incentive Bonus Plan [Line Items] |  |  |
Valuation milestone amount in market capitalization | 5,000.0 |  |
Maximum [Member] | Exceeds $5 Billion Market Capitalization For No Less Than 20 Consecutive Trading Days [Member] |  |  |
Cash Incentive Bonus Plan [Line Items] |  |  |
Cash bonus award | $ 322.3 |  |
Maximum [Member] | Second Through Eighth Valuation Milestones [Member] |  |  |
Cash Incentive Bonus Plan [Line Items] |  |  |
Cash bonus award |  | $ 225.0 |

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