Related Party Relationships - Additional Information (Details) - USD ($) $ in Millions		1 Months Ended		4 Months Ended
	Oct. 30, 2018	Nov. 30, 2018	Oct. 31, 2018	Jun. 30, 2018
Warp Drive
Related Party Transaction [Line Items]
Convertible notes payable			$ 2.0
Convertible note annual interest rate computed on basis of a 360-day year			8.00%
Series B Redeemable Convertible Preferred Stock
Related Party Transaction [Line Items]
Issuance of redeemable convertible preferred stock, net of issuance costs, shares		435,547		7,731,155
Series B Redeemable Convertible Preferred Stock | Warp Drive
Related Party Transaction [Line Items]
Issuance of redeemable convertible preferred stock, net of issuance costs, shares			6,797,915
Convertible notes payable			$ 2.0
Conversion of redeemable convertible preferred stock into common stock, shares	200,493		200,493
Series B Redeemable Convertible Preferred Stock | Third Rock Ventures
Related Party Transaction [Line Items]
Issuance of redeemable convertible preferred stock, net of issuance costs, shares			1,708,824
Sanofi Agreement | Series B Redeemable Convertible Preferred Stock
Related Party Transaction [Line Items]
Issuance of redeemable convertible preferred stock, net of issuance costs, shares			3,363,050