COMMITMENTS AND CONTINGENCIES - Other Leases (Details) $ in Thousands			12 Months Ended
	Aug. 01, 2019 USD ($) ft²	Jul. 19, 2019 USD ($) ft²	Jun. 30, 2019 USD ($) ft²	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)
Commitment And Contingency [Line Items]
Base rent			$ 1,600	$ 1,200	$ 700
Malyern, Pennsylvania (Office Space)
Commitment And Contingency [Line Items]
Area of leased office space | ft²			23,138
Base rent			$ 48
Malyern, Pennsylvania (Office Space) | Maximum
Commitment And Contingency [Line Items]
Base rent			$ 53
Malyern, Pennsylvania (Warehouse)
Commitment And Contingency [Line Items]
Area of leased office space | ft²			11,250
Base rent			$ 6
Portland, Oregon
Commitment And Contingency [Line Items]
Area of leased office space | ft²			5,362
Base rent			$ 11
San Francisco, California
Commitment And Contingency [Line Items]
Area of leased office space | ft²			8,400
Base rent			$ 45
San Francisco, California | Maximum
Commitment And Contingency [Line Items]
Base rent			$ 47
Matairie, Louisiana
Commitment And Contingency [Line Items]
Area of leased office space | ft²			7,745
Base rent			$ 15
Lease term			74 months
Matairie, Louisiana | Maximum
Commitment And Contingency [Line Items]
Base rent			$ 16
Subsequent Event | Denver, Colorado
Commitment And Contingency [Line Items]
Area of leased office space | ft²	16,713	16,713
Base rent	$ 45	$ 45
Lease term	89 months	89 months
Subsequent Event | Denver, Colorado | Maximum
Commitment And Contingency [Line Items]
Base rent	$ 53	$ 53