FAIR VALUE OF FINANCIAL INSTRUMENTS - Fair Value of the Company Financial Instruments that are Required to be Measured at Fair Value (Details) - USD ($)	9 Months Ended
	Mar. 31, 2018	Jun. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair values of Level 3 financial instrument		$ 3,700,000
Fair value of common stock warrants		$ 2,200,000
Fair value transfers assets, Level 1 to Level 2	$ 0
Fair value transfers assets, Level 2 to Level 1	0
Fair Value transfers liabilities, Level 1 to Level 2	0
Fair Value transfers liabilities, Level 2 to Level 1	0
Warrants exercised	5,200,000
Fair Value Adjustment of Warrants	$ 1,500,000
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation method used to determine fair value	proprietary valuation models