Income Taxes (Components of Net Deferred Income Tax Assets and Liabilities) (Details) - USD ($)	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Net operating loss carryforward	$ 7,042,134	$ 11,323,998
Executive post retirement costs	178,788	306,421
General business credit	207,698	207,698
Allowance for doubtful accounts	24,975	58,521
Accrued vacation	46,527	89,477
Inventory reserve	96,813	117,985
Accelerated depreciation	119,980	38,492
Warranty reserve	6,736	10,907
Total deferred income tax assets	7,723,651	12,153,499
Valuation allowance	(7,562,716)	(12,060,831)
Deferred income tax liabilities:
Deferred Tax Assets, Net of Valuation Allowance	160,935	92,668
Deferred Tax Liabilities, Property, Plant and Equipment	160,935	92,668
Deferred Tax Liabilities, Gross	160,935	92,668
Deferred Tax Assets, Net	0	0
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 4,498,113	$ 147,610