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SHARE-BASED COMPENSATION - Restricted Stock Awards - Additional Information (Details) - Restricted stock awards - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024
Stock-Based Compensation
Unrecognized compensation expense	$ 3.6
Weighted average period	1 year 10 months 24 days
Marine Products
Stock-Based Compensation
Stock awards granted	48,836
2015 Plan
Stock-Based Compensation
Fair value of vested shares	$ 4.8	$ 2.7	$ 2.9
Stock awards granted	192,574	274,944	181,706
2015 Plan \| Minimum \| Employees
Stock-Based Compensation
Vesting period (in years)	1 year
2015 Plan \| Maximum \| Employees
Stock-Based Compensation
Vesting period (in years)	3 years