Related Party Transactions - Additional Information (Details) - Kura Japan - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 31, 2019	May 31, 2022	May 31, 2021	May 31, 2022	May 31, 2021
Travel and Translation Expense
Related Party Transaction [Line Items]
Reimbursements by related party		$ 0	$ 2	$ 28	$ 27
Revolving Credit Facility Agreement | COVID-19
Related Party Transaction [Line Items]
Credit facility maximum borrowing capacity		$ 45,000		$ 45,000
Amended and Restated Exclusive License Agreement
Related Party Transaction [Line Items]
Royalty fee of net sales	0.50%