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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Inventory (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Jun. 30, 2020
Inventory [Abstract]    
Raw materials $ 2,040 $ 1,402
Finished goods 5,063 5,300
Total inventory 7,103 6,702
Less: current portion 6,114 5,638
Inventory, net of current portion $ 989 $ 1,064