SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Inventory (Details) - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Inventory [Abstract]
Total inventory	$ 4,800,000	$ 4,000,000
Finished goods	3,500,000	2,700,000
Raw materials	1,300,000	1,300,000
Inventory, current	3,770,000	3,986,000
Inventory write-offs	$ 55,000	$ 0	$ 0