GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Finite-Lived Intangible Assets [Line Items]
Original Amount	$ 5,236	$ 5,150
Accumulated Amortization	(1,711)	(1,104)
Net Amount	3,525	4,046
Intangible assets, amortization expense	$ 600	600	$ 100
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives	7 years
Original Amount	$ 3,007	3,007
Accumulated Amortization	(919)	(490)
Net Amount	2,088	2,517
Permits
Finite-Lived Intangible Assets [Line Items]
Original Amount	1,459	1,373
Accumulated Amortization	(390)	(288)
Net Amount	$ 1,069	1,085
Permits | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives	6 years
Permits | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives	15 years
Patents
Finite-Lived Intangible Assets [Line Items]
Original Amount	$ 383	383
Accumulated Amortization	(278)	(264)
Net Amount	$ 105	119
Patents | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives	5 years
Patents | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives	17 years
Tradename
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives	7 years
Original Amount	$ 270	270
Accumulated Amortization	(77)	(39)
Net Amount	$ 193	231
Non-compete
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives	5 years
Original Amount	$ 117	117
Accumulated Amortization	(47)	(23)
Net Amount	$ 70	$ 94