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STOCK BASED COMPENSATION PLANS - Additional Information (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2020 USD ($) plan $ / shares shares	Jun. 30, 2019 USD ($) $ / shares shares	Jun. 30, 2018 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of active stock based compensation plans \| plan	4
Warrants outstanding (in shares) \| shares	23,978	23,978
Exercise price of warrants (in USD per share) \| $ / shares	$ 5.00	$ 5.00
Weighted average grant date fair value (in USD per share) \| $ / shares	$ 3.84	$ 4.15	$ 2.42
Fair value of stock options vested \| $	$ 1.7	$ 0.2	$ 0.4
Stock-based compensation expense, tax benefits recognized \| $	$ 0.5	$ 0.3	$ 0.3
Stock grants \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award percentage	33.33%
Stock grants \| Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award percentage	33.33%
Stock grants \| Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award percentage	33.33%
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation termination period	7 years
Minimum \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation vesting period	3 years
Minimum \| RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation vesting period	1 year
Maximum \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation vesting period	4 years
Maximum \| RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation vesting period	3 years