Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Including the current and noncurrent portions, the carrying value as of the balance sheet date of notes payable to banks, excluding mortgage notes, initially due beyond one year or beyond the operating cycle if longer.

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Line of credit (Details) - USD ($)	3 Months Ended		9 Months Ended
Line of credit (Details) - USD ($)	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2019	Jun. 29, 2018
Line of Credit Facility [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	$ 201,575		$ 201,575
Line of Credit Facility, Periodic Payment, Interest	$ 1,500	$ 3,627	$ 8,842	$ 13,243
Debt Instrument, Interest Rate, Stated Percentage	1.00%		1.00%
Line of Credit Facility, Interest Rate at Period End	3.99%		3.99%
Accrued expenses	$ 683,409		$ 683,409		$ 656,707
Notes Payable to Banks [Member]
Line of Credit Facility [Line Items]
Notes Payable to Bank						$ 250,000
Debt Instrument, Interest Rate, Stated Percentage						5.00%
Debt Instrument, Basis Spread on Variable Rate			74.00%
Debt Instrument, Interest Rate During Period			5.74%
Line of Credit Facility, Collateral Fees, Amount				$ 250,000