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PROPERTY, PLANT AND EQUIPMENT - Depreciation expense (Details) - USD ($)
3 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Property, Plant and Equipment [Line Items]    
Depreciation $ 13,000 $ 34,000
Cost of goods sold    
Property, Plant and Equipment [Line Items]    
Depreciation 9,000 30,000
General and administrative expense.    
Property, Plant and Equipment [Line Items]    
Depreciation $ 4,000 $ 4,000