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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Thousands
6 Months Ended
Jan. 06, 2021
Oct. 05, 2020
Jul. 05, 2020
Apr. 03, 2020
Feb. 02, 2020
Nov. 05, 2019
Dec. 31, 2020
Dec. 31, 2019
Commitments and Contingencies                
Acquisition consideration paid             $ 48,832 $ 72,417
Khoemacau                
Commitments and Contingencies                
Acquisition consideration paid $ 32,600 $ 32,500 $ 11,100 $ 47,900 $ 22,000 $ 65,800    
Total contributions             212,000  
Maximum future contingent payments             53,000  
Ilovica                
Commitments and Contingencies                
Maximum future contingent payments             $ 163,750