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Leases (Tables)
 12 Months Ended
Jun. 30, 2020
Leases [Abstract]  
Schedule of operating leases

   June 30, 2020   June 30, 2019   June 30, 2018 
No later than one year   2,308    8,663    4,832 
Later than one year and not later than five years   5,266    13,511    9,955 
Later than five years   2,398    902    1,456 
    9,972    23,076    16,243 
Schedule of non-cancellable operating leases

   June 30, 2020   June 30, 2019   June 30, 2018 
No later than one year   729    13,216    10,702 
Later than one year and not later than five years   20,681    29,731    49,741 
Later than five years   9,703    21,360    18,433 
    31,113    64,307    78,876