Stockholders' Equity - Additional Information (Details) $ / shares in Units, $ in Millions	9 Months Ended
	Mar. 31, 2021 USD ($) $ / shares shares
Class Of Stock [Line Items]
Unamortized stock-based compensation expense | $	$ 24.5
Weighted-average period over which unrecognized compensation cost is expected to be recognized	2 years 4 months 24 days
Class of warrant exercise price | $ / shares	$ 4.50
Class of warrant exercisable period	5 years
Class of warrant exercisable period ends	2023-09
Warrants issued or issuable | shares	0
2019 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Unamortized stock-based compensation expense | $	$ 0.6
Weighted-average period over which unrecognized compensation cost is expected to be recognized	12 months
Expected volatility of option granted, minimum	81.00%
Expected volatility of option granted, maximum	88.40%
Risk-free interest rate, minimum	0.05%
Risk-free interest rate, maximum	0.13%
Expected dividend yield	0.00%
Restricted Stock Units
Class Of Stock [Line Items]
Unamortized stock-based compensation expense | $	$ 70.7
Weighted-average period over which unrecognized compensation cost is expected to be recognized	3 years 3 months 18 days
Number of other than options granted | shares	308,308
Weighted grant-date fair value | $ / shares	$ 120.71
Minimum | 2019 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Expected term of stock options granted	6 months
Minimum | Restricted Stock Units
Class Of Stock [Line Items]
Vest over requisite period	1 year
Maximum
Class Of Stock [Line Items]
Issuance of warrants | shares	5,600,000
Maximum | 2019 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Expected term of stock options granted	1 year
Maximum | Restricted Stock Units
Class Of Stock [Line Items]
Vest over requisite period	4 years