Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Going concern, Intangible assets and Inventories (Detail)

v3.22.2.2
Summary of Significant Accounting Policies - Going concern, Intangible assets and Inventories (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Feb. 28, 2022
Nov. 30, 2021
Aug. 31, 2021
Feb. 28, 2021
Nov. 30, 2020
Nov. 30, 2021
Nov. 30, 2020
Feb. 28, 2022
Feb. 28, 2021
May 31, 2022
May 31, 2021
May 31, 2020
Summary Of Significant Accounting Policies [Line Items]                        
Net loss $ 41,285 $ 40,077 $ 45,337 $ 37,581 $ 37,980 $ 85,414 $ 68,812 $ 126,699 $ 106,393 $ 210,820 $ 176,465 $ 139,936
Accumulated deficit $ 681,622 $ 639,940 $ 599,432 $ 483,183 $ 445,191 $ 639,940 $ 445,191 $ 681,622 $ 483,183 766,131 553,675 375,301
Balance in excess of federally insured limits                   4,000 33,700  
Intangible asset impairment charges                   0 10,000 $ 0
Inventory write-off                   $ 73,490 $ 5,027  
Bulk Drug Substance [Member]                        
Summary Of Significant Accounting Policies [Line Items]                        
Shelf life                   4 years    
Extended shelf life                   4 years