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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
May 31, 2022
May 31, 2021
May 31, 2020
Cash used in operating activities:      
Net loss $ (434,132) $ (336,014) $ (100,833)
Adjustments for:      
Deferred income tax recovery (27,538) (24,873) (13,305)
Unrealized foreign exchange loss 18,001 49,342 (451)
Amortization 154,592 67,832 35,669
Loss (gain) on sale of capital assets (682) (1,523) 8,075
Inventory valuation write down 67,000 19,919  
Impairment 378,240   50,679
Other non-cash items (9,647) 3,025 9,608
Stock-based compensation 35,994 17,351 18,079
Loss (gain) on long-term investments & equity investments 4,914 1,624 24,295
Loss (gain) on derivative instruments (227,583) 169,537 (53,611)
Change in fair value of contingent consideration (44,650)    
Transaction costs associated with business acquisitions   59,917  
Change in non-cash working capital (91,771) (70,854) (78,832)
Net cash used in operating activities (177,262) (44,717) (100,627)
Cash (used in) provided by investing activities:      
Proceeds from disposal of marketable securities     14,816
Investment in capital and intangible assets (34,064) (38,874) (98,786)
Proceeds from disposal of capital and intangible assets 12,205 6,608 1,411
Promissory notes advances   (2,419)  
Repayment of notes receivable   5,752 19,396
Investment in long-term investments and equity investees     (451)
Proceeds from disposal of long-term investments and equity investees   8,430 19,570
Net cash acquired (paid) on business acquisitions 326 66,608 (25,902)
Net cash (used in) provided by investing activities (21,533) 46,105 (69,946)
Cash (used in) provided by financing activities:      
Share capital issued, net of cash issuance costs 262,509 102,550 74,395
Proceeds (payment) from warrants and options exercised (3,283) 144 3,918
Repayment of convertible debentures (88,026)   (812)
Proceeds from long-term debt   102,798 60,944
Repayment of long-term debt (40,254) (64,559) (8,114)
Repayment of lease liabilities (4,672) (1,058) (126)
Increase in bank indebtedness 9,406 8,328 401
Dividend paid to NCI (7,484) (23,895)  
Net cash provided by financing activities 128,196 124,308 130,606
Effect of foreign exchange on cash and cash equivalents (1,958) 2,124 (6,572)
Net decrease in cash and cash equivalents (72,557) 127,820 (46,539)
Cash and cash equivalents, beginning of period 488,466 360,646 407,185
Cash and cash equivalents, end of period $ 415,909 $ 488,466 $ 360,646