INCOME TAXES (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax benefit at statutory U.S. federal rate	$ 4,389	$ 4,270
Income tax benefit attributable to U.S. states	1,584	1,420
Impact of reduction in Colorado tax rate	(42)	0
Non-taxable derivative gains	(377)	0
Non-deductible expenses	(2)	(12)
Stock option expirations	3,700	52
Other	4	(392)
Change in valuation allowance	(2,602)	(6,018)
Total income tax expense	$ 0	$ 0