Subsequent Events - Additional Information (Details) $ / shares in Units, $ in Millions					6 Months Ended
	Aug. 05, 2020 USD ($) shares	Jul. 28, 2020 USD ($) shares	Jul. 20, 2020	Jul. 15, 2020 $ / shares shares	Jun. 30, 2020 $ / shares shares
Subsequent Event [Line Items]
Number of stock options granted to purchase common stock					2,127,318
Granted | $ / shares					$ 4.33
Contractual term of stock options					4 years 9 months 18 days
Subsequent Event | 2020 ESPP
Subsequent Event [Line Items]
Common stock initially reserved for future issuance				317,484
Percentage of outstanding shares increase in shares reserved for issuance				1.00%
Maximum increase in common stock shares reserved for issuance				634,969
Subsequent Event | Amendment to 2019 Stock Option and Grant Plan
Subsequent Event [Line Items]
Vesting percentage upon sale				100.00%
Subsequent Event | 2020 Stock Option and Incentive Plan
Subsequent Event [Line Items]
Common stock initially reserved for future issuance				3,809,818
Cumulative increase in common stock reserve for issuance, percentage				5.00%
Subsequent Event | 2020 Stock Option and Incentive Plan | Director
Subsequent Event [Line Items]
Number of stock options granted to purchase common stock				132,864
Granted | $ / shares				$ 19
Contractual term of stock options				10 years
Vesting period of stock options, description				The options have a 10-year contractual term and vest on the earlier of (i) the first anniversary of the grant date or (ii) the Company’s next annual meeting of the stockholders, subject to continued service through the applicable vesting date.
Subsequent Event | 2020 Stock Option and Incentive Plan | Director | Maximum
Subsequent Event [Line Items]
Vesting percentage upon sale				100.00%
Subsequent Event | 2020 Stock Option and Incentive Plan | CEO
Subsequent Event [Line Items]
Number of stock options granted to purchase common stock				1,035,424
Granted | $ / shares				$ 19
Contractual term of stock options				10 years
Equity ownership percentage on fully diluted basis				5.00%
Vesting period of stock options				4 years
Subsequent Event | 2020 Stock Option and Incentive Plan | CEO | Maximum
Subsequent Event [Line Items]
Vesting percentage upon sale				100.00%
Subsequent Event | Common stock
Subsequent Event [Line Items]
Reverse stock split			On July 20, 2020, the Company effected a 1-for-3.3115 reverse stock split of the Company’s common stock
Reverse stock split, conversion ratio			0.30
Number of common stock shares issued from conversion of outstanding convertible preferred stock shares		22,460,076
Subsequent Event | Common stock | IPO
Subsequent Event [Line Items]
Common stock, shares issued during period		10,586,316
Gross proceeds from initial public offering | $		$ 201.1
Net proceeds after deducting underwriting discounts and commissions and other estimated offering expenses payable | $		$ 184.0
Underwriters exercise option to purchase additional shares of common stock	1,505,359
Net proceeds after deducting commissions from underwriter purchase of additional share of common stock | $	$ 26.6