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SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
Dec. 31, 2021
Text block [abstract]  
Summary of Company's Ownership Percentage in Each of Its Subsidiaries The following table sets forth the Company’s ownership percentage in each of its subsidiaries as of December 31,
Name of Subsidiary
  
Percentage Ownership as

at December 31, 2021
 
 
Percentage Ownership as

at December 31, 2020
 
NXE Energy Royalty Ltd.
  
 
100
% 
 
 
100
% 
NXE Energy SW1 Ltd.
  
 
100
% 
 
 
100
% 
NXE Energy SW3 Ltd.
  
 
100
% 
 
 
100
% 
IsoEnergy Ltd.
  
 
51
% 
 
 
51
% 
Summary of Depreciation Over the Estimated Useful Lives of Each Significant Component Depreciation is calculated over the estimated useful lives of each significant component as follows:
     
     
- Computing equipment
   
55
% declining balance basis
- Software
   
55
% declining balance basis
- Field equipment
   
20
% declining balance basis
- Leasehold improvements
   
Lease term straight-line basis
- Road
   
5-year
straight-line basis
- Lease right-of-use assets
   
Lease term straight-line basis
- Vehicles
   
2-year
straight-line basis
   
Depreciation methods, useful lives, and residual values are reviewed at least annually and adjusted if appropriate.
Schedule of accounting policy for financial instruments
The Company has the following financial instruments, which are classified under IFRS 9 in the table below: 

Financial assets/liabilities
  
Classification
Cash    Amortized cost
Amounts receivable    Amortized cost
Marketable securities    FVTOCI
Accounts payable and accrued liabilities    Amortized cost
Convertible debentures    FVTPL