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BUSINESS DESCRIPTION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property and Equipment (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Property and Equipment:
Depreciation expense	$ 2.6	$ 3.7	$ 7.4
Asset retirement obligation	$ 0.1	$ 0.5	$ 1.0
Improvements \| Maximum
Property and Equipment:
Estimated useful asset lives	10 years
Equipment \| Minimum
Property and Equipment:
Estimated useful asset lives	3 years
Equipment \| Maximum
Property and Equipment:
Estimated useful asset lives	10 years
Furniture \| Minimum
Property and Equipment:
Estimated useful asset lives	3 years
Furniture \| Maximum
Property and Equipment:
Estimated useful asset lives	10 years
Leased Software \| Minimum
Property and Equipment:
Estimated useful asset lives	3 years
Leased Software \| Maximum
Property and Equipment:
Estimated useful asset lives	10 years
Software Development \| Minimum
Property and Equipment:
Estimated useful asset lives	3 years
Software Development \| Maximum
Property and Equipment:
Estimated useful asset lives	7 years