SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Employee Benefit Plans (Details) - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Defined Contribution Plan Disclosure [Line Items]
Employers match percentage	25.00%
Maximum annual percentage contribution per employee	6.00%
Company contributions to the 401(k) plan, less than	$ 100,000	$ 100,000	$ 100,000
Prior group health benefit plan, individual deductible	2,500
Group health benefit plan, family deductible	2,500
Group health benefit plan, third party insurance company coverage beginning amount, individual	2,500
Group health benefit plan, third party insurance company coverage beginning amount, family	10,000
Self-insured liability, health insurance, less than	100,000	100,000
Executive officer
Defined Contribution Plan Disclosure [Line Items]
Aggregate stock-based compensation expense	$ 0	$ 0	$ 0