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Stockholders' Equity - Summary of Common Stock Reserved for Future Issuance (Details)	Dec. 31, 2020 shares
Stockholders Equity Note [Abstract]
Stock options outstanding	18,912,529
Restricted stock units outstanding	602,741
Stock options available for grant	1,575,955
Employee Stock Purchase Plan	176,250
Warrants outstanding	220,164
Shares of common stock underlying Convertible Notes outstanding (see Note 8)	9,510,208
Total shares reserved for future issuance	30,997,847

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Aggregate number of convertible common shares reserved for future issuance.

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Aggregate number of common shares reserved under employee stock purchase plan for future issuance.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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