PRODUCT WARRANTY OBLIGATIONS (Details) - USD ($)	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance, beginning of year	$ 384,959	$ 483,530
Provision charged to expense	180,753	159,990
Warranty expenses incurred	(189,612)	(258,561)
Balance, end of year	$ 376,100	$ 384,959