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FAIR VALUE MEASUREMENTS (Details) - USD ($)
Mar. 31, 2019
Jun. 30, 2018
Money market account $ 19,645,741 $ 37,808,099
Level 1    
Money market account 19,645,741 37,808,099
Level 2    
Money market account 0 0
Level 3    
Money market account $ 0 $ 0