Summary of Significant Accounting Policies - Redeemable Convertible Preferred Stock (Details) $ in Thousands	2 Months Ended
	Jun. 30, 2019 USD ($) shares
Class of Stock [Line Items]
Conversion of preferred stock to common stock upon IPO | $	$ 144,140
Common Stock
Class of Stock [Line Items]
Conversion of preferred stock to common stock upon IPO (in shares) | shares	23,178,555