INCOME TAXES - Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax benefit at statutory U.S. federal rate	$ 14,374	$ 10,875
Income tax benefit attributable to U.S. states	4,413	3,468
Impact of reduction in Colorado tax rate		(78)
Non-taxable derivative loss	(598)	0
Non-deductible expenses	(505)	(442)
Stock option expirations	(16)	(921)
NOL expirations	(7,004)	0
Other	4	(399)
Change in valuation allowance	(10,668)	(12,503)
Total income tax expense	$ 0	$ 0