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Income Taxes and Deferred Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 27, 2020
Dec. 22, 2017
May 31, 2021
May 31, 2020
May 31, 2019
Operating Loss Carryforwards [Line Items]          
Adjustable taxable income deductible net interest percentage 30.00%   50.00%    
U.S. statutory federal corporate tax rate   35.00% 21.00%    
Operating loss carry-forwards     $ 510,456    
Net operating loss carry-forward expiration year     2028    
Net operating loss carry-forward expiration period     20 years    
Unrecognized tax benefits     $ 0 $ 0 $ 0
Interest and penalty expenses related to uncertain tax positions     0 0 $ 0
Accrued interest and penalties on unrecognized tax positions     $ 0 0  
Earliest Tax Year | Canada          
Operating Loss Carryforwards [Line Items]          
Open tax year     2016    
Earliest Tax Year | Germany          
Operating Loss Carryforwards [Line Items]          
Open tax year     2016    
Earliest Tax Year | Australia          
Operating Loss Carryforwards [Line Items]          
Open tax year     2017    
Earliest Tax Year | United States          
Operating Loss Carryforwards [Line Items]          
Open tax year     2018    
Deferred Tax Asset, Valuation Allowance          
Operating Loss Carryforwards [Line Items]          
Increase in deferred tax valuation allowance     $ 261,357 $ 0  
United States          
Operating Loss Carryforwards [Line Items]          
Net operating loss carryforwards offset percentage of taxable income 100.00%   80.00%    
Operating loss carry-forwards     $ 224,795    
Portugal | Earliest Tax Year          
Operating Loss Carryforwards [Line Items]          
Open tax year     2017