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MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Cost [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year $ 545,151 $ 460,183
Capitalized expenditures 44,426 35,145
Acquisition (Note 3) 13,135 16,660
Environmental rehabilitation 812 (1,610)
Derecognition (185)  
Foreign currency translation impact 16,709 34,773
Balance at end of year 620,048 545,151
Impairment and accumulated depletion [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year (267,722) (235,597)
Depletion (18,569) (16,340)
Derecognition 185  
Foreign currency translation impact (7,494) (15,785)
Balance at end of year (293,600) (267,722)
Carrying amounts [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year 277,429  
Balance at end of year 326,448 277,429
Producing and development properties YMD [Member] | Cost [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year 348,000 293,136
Capitalized expenditures 37,307 31,138
Acquisition (Note 3)
Environmental rehabilitation (68) (1,268)
Derecognition  
Foreign currency translation impact 12,096 24,994
Balance at end of year 397,335 348,000
Producing and development properties YMD [Member] | Impairment and accumulated depletion [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year (122,977) (100,390)
Depletion (15,974) (13,921)
Derecognition  
Foreign currency translation impact (4,313) (8,666)
Balance at end of year (143,264) (122,977)
Producing and development properties YMD [Member] | Carrying amounts [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year 225,023  
Balance at end of year 254,071 225,023
Producing and development properties BYP [Member] | Cost [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year 64,609 63,572
Capitalized expenditures 30
Acquisition (Note 3)
Environmental rehabilitation (18) (135)
Derecognition  
Foreign currency translation impact 501 1,142
Balance at end of year 65,092 64,609
Producing and development properties BYP [Member] | Impairment and accumulated depletion [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year (57,264) (56,688)
Depletion
Derecognition  
Foreign currency translation impact (257) (576)
Balance at end of year (57,521) (57,264)
Producing and development properties BYP [Member] | Carrying amounts [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year 7,345  
Balance at end of year 7,571 7,345
Producing and development properties GC [Member] | Cost [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year 115,610 103,311
Capitalized expenditures 4,507 3,890
Acquisition (Note 3)
Environmental rehabilitation 898 (207)
Derecognition  
Foreign currency translation impact 3,891 8,616
Balance at end of year 124,906 115,610
Producing and development properties GC [Member] | Impairment and accumulated depletion [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year (87,296) (78,355)
Depletion (2,595) (2,419)
Derecognition  
Foreign currency translation impact (2,924) (6,522)
Balance at end of year (92,815) (87,296)
Producing and development properties GC [Member] | Carrying amounts [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year 28,314  
Balance at end of year 32,091 28,314
Exploration and evaluation properties RZY [Member] | Cost [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year 185 164
Capitalized expenditures
Acquisition (Note 3)
Environmental rehabilitation
Derecognition (185)  
Foreign currency translation impact 21
Balance at end of year 185
Exploration and evaluation properties RZY [Member] | Impairment and accumulated depletion [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year (185) (164)
Depletion  
Derecognition 185  
Foreign currency translation impact (21)
Balance at end of year (185)
Exploration and evaluation properties RZY [Member] | Carrying amounts [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year  
Balance at end of year
Exploration and evaluation properties Kuanping [Member] | Cost [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year
Capitalized expenditures 24
Acquisition (Note 3) 13,135
Environmental rehabilitation  
Derecognition  
Foreign currency translation impact 221
Balance at end of year 13,380
Exploration and evaluation properties Kuanping [Member] | Impairment and accumulated depletion [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year
Depletion
Derecognition  
Foreign currency translation impact
Balance at end of year
Exploration and evaluation properties Kuanping [Member] | Carrying amounts [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year  
Balance at end of year 13,380
Exploration and evaluation properties La Yesca [Member] | Cost [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year 16,747
Capitalized expenditures 2,588 87
Acquisition (Note 3) 16,660
Environmental rehabilitation
Derecognition  
Foreign currency translation impact
Balance at end of year 19,335 16,747
Exploration and evaluation properties La Yesca [Member] | Impairment and accumulated depletion [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year
Depletion
Derecognition  
Foreign currency translation impact
Balance at end of year
Exploration and evaluation properties La Yesca [Member] | Carrying amounts [Member]    
MINERAL RIGHTS AND PROPERTIES (Details) - Schedule of Mineral Rights and Properties [Line Items]    
Balance at beginning year 16,747  
Balance at end of year $ 19,335 $ 16,747