Amount of capitalization to meet final milestones.

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Amount of capitalization to meet next three milestones.

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Amount of capitalization to meet next three milestones thereafter.

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Amount of capitalization to meet next two milestones.

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First market capitalization milestone amount.

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Market capitalization to fully vest in award increase.

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Number of tranches.

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Option to purchase common stock period.

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Percentage of premium to closing sales price of common stock.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost to be recognized for option under share-based payment arrangement.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Change in the weighted average exercise price of options outstanding.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Purchase price of common stock expressed as a percentage of its fair value.

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Stock Incentive and Employee Benefit Plans - CEO Performance Award - Additional Information (Details) - C E O Performance Award $ / shares in Units, $ in Millions		12 Months Ended
	Aug. 07, 2020 USD ($) Tranche $ / shares shares	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life of options (years)		8 years 9 months 18 days
Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option to purchase common stock period	10 years
Common stock sold in registered direct offering \| shares	24,935,882
Percentage of outstanding shares of common stock sold	10.00%
Number of tranches \| Tranche	10
First market capitalization milestone amount	$ 5,000.0
Amount of capitalization to meet next two milestones	2,000.0
Amount of capitalization to meet next three milestones	3,000.0
Amount of capitalization to meet next three milestones thereafter	4,000.0
Amount of capitalization to meet final milestones	5,000.0
Market capitalization to fully vest in award increase	$ 35,000.0
Exercise price per share \| $ / shares	$ 17.30
Percentage of premium to closing sales price of common stock	20.00%
Stock-based compensation expense		$ 0.8	$ 10.8
Unrecognized compensation cost related to unvested stock option grants		$ 87.7
Volatility		91.00%
Dividend yield		0.00%
Risk-free interest rate		0.75%
Expected life of options (years)		9 years 9 months 18 days