v3.26.1
Note 12 - Income Taxes and Deferred Income Taxes - Reconciliation of Effective Income Tax Rate (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 22, 2017
May 31, 2026
May 31, 2025
May 31, 2024
Expected Income Tax Expense at the Federal Statutory Rate of 21%   $ (18,492) $ (483,708) $ (51,325)
Expected Income Tax Expense at the Federal Statutory Rate of 21%, percent 35.00% 21.00%    
Imputed Interest   $ 6,314    
Imputed Interest, percent   (7.20%)    
Pre-tax book income (loss) from DRE's   $ 6,229    
Pre-tax book income (loss) from DRE's, percent   (7.10%)    
Section 162(m)   $ 2,862    
Section 162(m), percent   (3.30%)    
Return-to-provision and other prior period adjustments(2)   $ 28,318 (33,098) 16,933
Return-to-provision and other prior period adjustments, percent   (32.20%)    
Changes in valuation allowances   $ (23,772) 179,090 20,250
Changes in valuation allowances, percent   27.00%    
Other   $ (1,578)    
Other, percent   1.80%    
State and Local Income Taxes, Net of Federal Income Tax Effect(1)   $ 2,875 (14,794) 612
State and Local Income Taxes, Net of Federal Income Tax Effect, percent   (3.30%)    
Tax rate differential     (41,680) (5,661)
Income tax expense, net   $ 17,098 (121,017) (26,616)
Effective Tax Rate, percent   (92.50%)    
Loss before net income taxes:   $ (88,060) (2,302,373) (249,020)
Foreign exchange and other     (14,371) (15,586)
Non-deductible expenses     6,292 6,147
Non-deductible (taxable) losses     32 (682)
Changes in enacted rates     (3,908) 2,394
Nondeductible Impairment     285,582 0
Change in fair value of warrant liability     $ (454) $ 302
Income Tax Jurisdiction, Foreign [Member] | Canada Revenue Agency [Member]        
Return-to-provision and other prior period adjustments(2)   $ (1,593)    
Return-to-provision and other prior period adjustments, percent   1.80%    
Changes in valuation allowances   $ 20,187    
Changes in valuation allowances, percent   (22.90%)    
Other   $ 394    
Other, percent   (0.40%)    
Tax rate differential   $ 1,893    
Tax rate differential, percent   (2.10%)    
Non-taxable portion of investment gains   $ (3,053)    
Non-taxable portion of investment gains, percent   3.50%    
Foreign exchange on subsidiaries   $ (3,005)    
Foreign exchange on subsidiaries, percent   3.40%    
Income Tax Jurisdiction, Foreign [Member] | Federal Ministry of Finance, Germany [Member]        
Return-to-provision and other prior period adjustments(2)   $ (2,076)    
Return-to-provision and other prior period adjustments, percent   2.40%    
Changes in valuation allowances   $ (103)    
Changes in valuation allowances, percent   0.10%    
Other   $ 2    
Other, percent   (0.00%)    
Tax rate differential   $ 1,572    
Tax rate differential, percent   (1.80%)    
Income Tax Jurisdiction, Foreign [Member] | Portuguese Tax Authority [Member]        
Other   $ 371    
Other, percent   (0.40%)    
Tax rate differential   $ (196)    
Tax rate differential, percent   0.20%    
Income Tax Jurisdiction, Foreign [Member] | Other Foreign Jursidictions [Member]        
Tax rate differential   $ (51)    
Tax rate differential, percent   0.10%