Provision for Income Taxes (Schedule of Deferred Tax Assets And Liabilities) (Details) - USD ($)	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Deferred tax assets:
Accrued expenses	$ 203,150	$ 195,915
ESOP	32,875	73,696
Stock-based compensation	51,140	81,659
Inventory - effect of uniform capitalization	53,863	36,935
Unrealized loss (gain) on investment securities	1,060	666
Other	1,437	2,384
Total deferred tax assets	343,525	391,255
Deferred tax liability:
Property, plant and equipment - principally due to differences in depreciation methods	361,218	294,267
Total deferred tax liability	361,218	294,267
Net deferred tax (liability) asset	(17,693)	96,988
Deferred tax expense (benefit)	$ 115,075	$ (46,488)