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Stock-based Compensation - Summary of Stock Option Activity (Details) - 2019 Plan - Stock Option	9 Months Ended
	Sep. 30, 2020 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares Available, Beginning Balance	1,874,759
Shares Available, Stock options authorized	873,321
Shares Available, Stock options granted	(343,621)
Shares Available, Stock options forfeited	16,381
Shares Available, Ending Balance	2,420,840
Number of Shares Outstanding, Beginning Balance	1,313,468
Number of Shares Outstanding, Stock options granted	343,621
Number of Shares Outstanding, Stock options exercised	(122,743)
Number of Shares Outstanding, Stock options forfeited	(16,381)
Number of Shares Outstanding, Ending Balance	1,517,965
Weighted Average Exercise Price Per Share, Beginning Balance | $ / shares	$ 9.77
Weighted Average Exercise Price Per Share, Stock options granted | $ / shares	34.75
Weighted Average Exercise Price Per Share, Stock options exercised | $ / shares	4.62
Weighted Average Exercise Price Per Share, Stock options forfeited | $ / shares	11.61
Weighted Average Exercise Price Per Share, Ending Balance | $ / shares	$ 15.66

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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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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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