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CASH AND CASH EQUIVALENTS (Tables)
 12 Months Ended
Jun. 30, 2019
CASH AND CASH EQUIVALENTS [Abstract]  
Cash and Cash Equivalents
  
2019
  2018  
2017
 


US$


US$


US$

          
Cash at bank and on hand
  
2,224,380
   
2,714,776
   
844,118
 
Short term deposits
  
2,207,770
   
4,523,713
   
2,692,200
 
   
4,432,150
   
7,238,489
   
3,536,318
 
             
Reconciliation of loss before income tax to net cash flows from operations
            
Loss for the year
  
(9,822,626
)
  
(9,957,817
)
  
(2,639,428
)
Adjustment for non-cash income and expense items
            
Depreciation and impairment
  
8,812
   
1,259
   
40,384
 
Share-based payments expense
  
438,375
   
1,172,164
   
861,973
 
Net foreign exchange loss/(gain)
  
(234,090
)
  
(52,538
)
  
619
 
Change in assets and liabilities
            
Decrease/(increase) in trade and other receivables
  
10,814
   
(1,516
)
  
(22,907
)
(Decrease)/increase in trade and other payables
  
154,987
   
1,505,657
   
433,536
 
Exchange differences arising on translation of foreign operations
  
(366,084
)
  
(249,205
)
  
(5,772
)
Net cash outflow from operating activities
  
(9,809,812
)
  
(7,581,996
)
  
(1,331,595
)