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Note 4 - Significant Accounting Policies (Details Textual)
 1 Months Ended 12 Months Ended
Jul. 01, 2021
kg
oz
Jan. 08, 2021
May 26, 2020
Nov. 12, 2018
Oct. 01, 2018
Jun. 30, 2021
kg
oz
Dec. 31, 2021
oz
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2023
oz
Dec. 31, 2022
oz
Feb. 20, 2019
Statement Line Items [Line Items]                        
Closing foreign exchange rate             108.67 81.79 16.77     2.5
Foreign currency allocation, percentage 71.50% 60.00% 70.00% 55.00% 30.00%   71.50%          
Foreign currency allocation, incremental revenue, percentage 100.00%         100.00%            
Baseline level of production per month (Kilogram) | kg 148.38         148.38            
Production per annum (Ounce) 57,000         57,000 67,000          
Target production rate, year two (Ounce)                   80,000 80,000  
Revenue recognition, variable rate             1.25%          
Machinery [member]                        
Statement Line Items [Line Items]                        
Property, plant, and equipment, useful life (Year)             10 years 10 years 10 years      
Motor vehicles [member]                        
Statement Line Items [Line Items]                        
Property, plant, and equipment, useful life (Year)             4 years 4 years 4 years      
Bottom of range [member]                        
Statement Line Items [Line Items]                        
Target production rate, year one (Ounce)                     73,000  
Right of use assets, useful life (Year)             3 years 3 years 3 years      
Bottom of range [member] | Buildings [member]                        
Statement Line Items [Line Items]                        
Property, plant, and equipment, useful life (Year)             10 years 10 years 10 years      
Bottom of range [member] | Fixtures and fittings [member]                        
Statement Line Items [Line Items]                        
Property, plant, and equipment, useful life (Year)             4 years 4 years 4 years      
Top of range [member]                        
Statement Line Items [Line Items]                        
Target production rate, year one (Ounce)                     80,000  
Right of use assets, useful life (Year)             6 years 6 years 6 years      
Top of range [member] | Buildings [member]                        
Statement Line Items [Line Items]                        
Property, plant, and equipment, useful life (Year)             15 years 15 years 15 years      
Top of range [member] | Fixtures and fittings [member]                        
Statement Line Items [Line Items]                        
Property, plant, and equipment, useful life (Year)             10 years 10 years 10 years