INCOME TAXES - Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax benefit at statutory U.S. federal rate	$ 15,626	$ 14,374
Income tax benefit attributable to U.S. states	5,042	4,413
Non-taxable derivative loss		(598)
Non-deductible expenses	(464)	(505)
Stock option expirations	(35)	(16)
NOL expirations		(7,004)
Other	3	4
Change in valuation allowance	(20,172)	(10,668)
Total income tax expense	$ 0	$ 0