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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Translation of Foreign Currency Transactions (Narrative) (Details) - Foreign currency forward contract
9 Months Ended
Dec. 31, 2018
USD ($)
Mar. 31, 2020
USD ($)
numberOfInstruments
Derivative [Line Items]    
Notional amount   $ 7,100,000
Derivative, Number of Instruments Held | numberOfInstruments   2
Other operating expenses    
Derivative [Line Items]    
Gain (loss) included in other operating expenses $ 38,000