GOODWILL AND INTANGIBLE ASSETS (Details) - USD ($)	3 Months Ended
	Sep. 30, 2017	Jun. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Original Amount	$ 5,191,000	$ 5,150,000
Accumulated Amortization	(1,256,000)	(1,104,000)
Net Amount	3,935,000	4,046,000
Intangible assets, amortization expense	200,000
Changes in goodwill	0
Future amortization of intangible assets [Abstract]
2018	606,000
2019	606,000
2020	606,000
2021	599,000
2022	571,000
Thereafter	947,000
Net Amount	$ 3,935,000	4,046,000
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives	7 years
Original Amount	$ 3,007,000	3,007,000
Accumulated Amortization	(597,000)	(490,000)
Net Amount	2,410,000	2,517,000
Future amortization of intangible assets [Abstract]
Net Amount	2,410,000	2,517,000
Permits
Finite-Lived Intangible Assets [Line Items]
Original Amount	1,414,000	1,373,000
Accumulated Amortization	(314,000)	(288,000)
Net Amount	1,100,000	1,085,000
Future amortization of intangible assets [Abstract]
Net Amount	$ 1,100,000	1,085,000
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	$ 383,000	383,000
Accumulated Amortization	(268,000)	(264,000)
Net Amount	115,000	119,000
Future amortization of intangible assets [Abstract]
Net Amount	$ 115,000	119,000
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	$ 270,000	270,000
Accumulated Amortization	(48,000)	(39,000)
Net Amount	222,000	231,000
Future amortization of intangible assets [Abstract]
Net Amount	$ 222,000	231,000
Non-compete
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives	5 years
Original Amount	$ 117,000	117,000
Accumulated Amortization	(29,000)	(23,000)
Net Amount	88,000	94,000
Future amortization of intangible assets [Abstract]
Net Amount	$ 88,000	$ 94,000