PROPERTY, PLANT AND EQUIPMENT - Summary of property and equipment (Details) - USD ($)	Jun. 30, 2019	Jun. 30, 2018
Property, Plant and Equipment [Line Items]
Accumulated depreciation	$ (1,689,936)	$ (2,368,519)
Property, plant and equipment	1	6,142
Land and Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	951,728	973,359
Plant and Machinery
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	16,476	153,308
Office equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	19,057	19,490
Project equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	656,434	1,103,794
Computer
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	10,365	10,601
Motor Vehicle
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 35,877	$ 114,109