Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Nov. 26, 2019	Jun. 30, 2020	Jun. 30, 2019		Jun. 30, 2018
Class of Stock [Line Items]
Vest over requisite service period		4 years
Option expiration period		10 years
Unvested shares of options granted with double trigger vesting acceleration percentage in event of sale		50.00%
Total intrinsic value of options exercised		$ 191,300	$ 3,800		$ 700
Weighted-average grant date fair value of options granted		$ 11.04	$ 4.24		$ 2.02
Unamortized stock-based compensation expense		$ 40,400
Weighted-average period over which unrecognized compensation cost is expected to be recognized		2 years 10 months 24 days
Options exercised		$ 12,232	$ 1,702	[1]	$ 693	[1]
Stock warrants outstanding		0	126,000
Class of warrant exercise price		$ 4.50
Class of warrant exercisable period		5 years
Class of warrant exercisable period ends		2023-09
Warrants issued or issuable		0
2019 Employee Stock Purchase Plan
Class of Stock [Line Items]
Number of shares of common stock reserved for issuance	1,400,000
Potential percentage of additional number of shares reserved for issuance each year	1.00%
Unamortized stock-based compensation expense		$ 1,500
Weighted-average period over which unrecognized compensation cost is expected to be recognized		12 months
Total number of shares issued	14,000,000
Percentage of employee compensation, maximum	15.00%
Fair value of option granted percentage	85.00%
Maximum
Class of Stock [Line Items]
Issuance of warrants		5,600,000
Incentive Stock
Class of Stock [Line Items]
Exercise price of incentive stock options granted under the Option Plans		100.00%
Nonstatutory Stock Options
Class of Stock [Line Items]
Exercise price of incentive stock options granted under the Option Plans		85.00%
Restricted Stock Units
Class of Stock [Line Items]
Unamortized stock-based compensation expense		$ 55,200
Weighted-average period over which unrecognized compensation cost is expected to be recognized		3 years 9 months 18 days
Fair value of shares vested		$ 200
Restricted Stock Units | Minimum
Class of Stock [Line Items]
Vest over requisite period		1 year
Restricted Stock Units | Maximum
Class of Stock [Line Items]
Vest over requisite period		4 years
2019 Equity Incentive Plan
Class of Stock [Line Items]
Number of shares of common stock reserved for issuance	7,100,000
Potential percentage of additional number of shares reserved for issuance each year	5.00%
Equity Incentive Plans
Class of Stock [Line Items]
Number of common shares available for issuance		6,187,598	11,370,068		6,337,779

[1] Amounts have been adjusted to reflect the adoption of Accounting Standards Update No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. See Note 1 to the consolidated financial statements for a summary of reclassifications and adjustments.