Provision for Income Taxes (Schedule of Deferred Tax Assets And Liabilities) (Details) - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Deferred tax assets:
Accrued expenses	$ 164,388	$ 203,150
ESOP	17,702	32,875
Stock-based compensation	56,382	51,140
Inventory - effect of uniform capitalization	64,148	53,863
Unrealized loss on investment securities		1,060
Other	1,437	1,437
Total deferred tax assets	304,057	343,525
Deferred tax liability:
Property, plant and equipment - principally due to differences in depreciation methods	541,150	361,218
Prepaid expenses	39,982
Total deferred tax liability	581,132	361,218
Net deferred tax liability	(277,075)	(17,693)
Deferred tax expense (benefit)	$ 258,040	$ 115,075