Income Taxes (Components of Net Deferred Income Tax Assets and Liabilities) (Details) - USD ($)	Jun. 30, 2017	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Net operating loss carryforward	$ 11,323,998	$ 11,222,477
Executive post retirement costs	306,421	318,743
General business credit	207,698	207,698
Allowance for doubtful accounts	58,521	68,910
Accrued vacation	89,477	105,816
Inventory reserve	117,985	67,361
Accelerated depreciation	38,492	16,340
Warranty reserve	10,907	10,907
Total deferred income tax assets	12,153,499	12,018,252
Valuation allowance	(12,060,831)	(11,913,221)
Deferred income tax liabilities:
Deferred Tax Assets, Net of Valuation Allowance	92,668	105,031
Deferred Tax Liabilities, Property, Plant and Equipment	92,668	105,031
Deferred Tax Liabilities, Gross	92,668	105,031
Deferred Tax Assets, Net	$ 0	$ 0