SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Leases (Details) $ in Thousands	Jul. 01, 2019 USD ($) lease	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating liabilities		$ 8,863
Operating lease, right-of-use asset		$ 8,747	$ 0
Number of leases | lease	50
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating liabilities	$ 4,600
Operating lease, right-of-use asset	$ 4,600