Stockholders' Equity (Deficit) (Details)	1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2019 shares	Mar. 31, 2020 vote $ / shares shares	Mar. 31, 2020 vote $ / shares shares	Jun. 30, 2019 $ / shares shares
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.000025	$ 0.000025
Preferred stock, shares authorized (in shares)		50,000,000	50,000,000
Preferred stock, shares outstanding (in shares)		0	0
Percentage of common stock held		66.67%	66.67%
Conversion of stock period			10 years
Percentage of common class B shares outstanding to total common shares outstanding (at least)			1.00%
Common stock, par value (in dollars per share) | $ / shares				$ 0.000025
Redeemable Convertible Preferred Stock
Class of Stock [Line Items]
Conversion of redeemable convertible preferred stock to common stock (in shares)	210,640,629	210,640,629	210,600,000
Class B Common Stock
Class of Stock [Line Items]
Common stock, number of votes per share | vote		20	20
Common stock, shares authorized (in shares)		2,500,000,000	2,500,000,000	400,000,000
Common stock, shares outstanding (in shares)		107,144,281	107,144,281	25,301,604
Class B Common Stock | Common Stock
Class of Stock [Line Items]
Conversion of redeemable convertible preferred stock to common stock (in shares)	210,640,629	210,640,629
Class A Common Stock
Class of Stock [Line Items]
Common stock, number of votes per share | vote		1	1
Common stock, shares authorized (in shares)		2,500,000,000	2,500,000,000	0
Common stock, shares outstanding (in shares)		175,029,321	175,029,321	0