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Note 13 - Net Foreign Exchange Gain (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
Feb. 20, 2019
Statement Line Items [Line Items]                    
Closing foreign exchange rate             108.67 81.79 16.77 2.5
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) | oz 57,000         57,000 67,000      
Foreign currency allocation, percentage 71.50% 60.00% 70.00% 55.00% 30.00%   71.50%