Stock-Based Compensation - Fair Value of Employee Option Grant Estimated on Date of Grant (Details) - Outstanding options to purchase common stock	3 Months Ended
Mar. 31, 2021 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award
Estimated weighted-average fair value (USD per share)	$ 13.15
Weighted Average
Weighted-average assumptions
Expected volatility	81.00%
Expected life, in years	6 years 1 month 6 days
Risk-free interest rate	0.71%
Expected dividend yield	0.00%

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- Definition

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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- Definition

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

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- Definition

Rate of weighted-average expected volatility for award under share-based payment arrangement.

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- Definition

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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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 718
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