STOCK-BASED COMPENSATION - Nonqualified Stock Option Activity (Details) - 2015 Plan - Nonqualified stock options - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Shares
Outstanding at beginning of year	122,640	86,985
Granted		137,786
Exercised	(1,578)	(86,985)
Forfeited or expired	(4,734)	(15,146)
Outstanding at end of year	116,328	122,640	86,985
Weighted Average Exercise Price
Outstanding at beginning of year	$ 10.70	$ 4.03
Granted		15.00
Exercised	10.70	4.03
Forfeited or expired	10.70	15.00
Outstanding at end of year	$ 10.70	10.70	$ 4.03
Reduction in exercise price pursuant to terms of the plan		$ 4.30
Weighted Average Remaining Contractual Term
Granted		10 years
Exercised	8 years 1 month 6 days
Forfeited or expired	8 years 1 month 6 days
Outstanding	8 years 1 month 6 days	9 years 1 month 6 days	4 years 8 months 12 days
Aggregate Intrinsic Value
Outstanding at beginning of year	$ 43	$ 833
Outstanding at end of year	$ 1,030	$ 43	$ 833