Convertible Debentures - Schedule of Convertible Debentures - APHA 24 (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Nov. 30, 2021	May 31, 2021
Debt Instrument [Line Items]
Opening balance	$ 667,624
Closing balance	554,854	$ 667,624
5.25% Convertible Notes ("APHA 24")
Debt Instrument [Line Items]
Opening balance	399,444
Debt settlement	(90,760)	(90,760)
Fair value adjustment	25,484	140,204
Closing balance	284,724	399,444
5.25% Convertible Notes ("APHA 24") \| 5.25% Contractual Debenture
Debt Instrument [Line Items]
Opening balance	$ 350,000	350,000
Closing balance		$ 350,000

Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Name:	us-gaap_ConvertibleDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant