Line of credit (Details) - USD ($)	3 Months Ended			9 Months Ended
	Mar. 31, 2019	Sep. 30, 2018	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018	Jun. 29, 2018	Dec. 29, 2016
Line of Credit Facility [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	$ 201,575			$ 201,575		$ 165,000
Line of Credit Facility, Periodic Payment, Interest	3,627		$ 16,339	13,243	$ 36,849
Repayments of Lines of Credit		$ 201,575
Interest paid				42,242	$ 37,207
Accrued expenses	$ 760,286			$ 760,286		874,421
Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity								$ 250,000
Line of Credit Facility, Current Borrowing Capacity						$ 250,000
Line of Credit Facility, Maximum Borrowing Capacity, as a Percentage of Inventory						50.00%
Debt Instrument, Closing Fee, Percent				1.00%
Line of Credit Facility, Renewal Fee, Percent				1.00%
Line of Credit Facility, Collateral Monitoring Fee, Percent		8.50%		0.70%
Line of Credit Facility, Collateral Monitoring Fee in Event of Default, Percent				1.00%
Repayments of Lines of Credit		$ 165,000
Interest paid		2,579
General and Administrative Expense		1,000
Line Of Credit Facility, Prime Plus Fee		1,895
Accrued expenses						$ 28,797
Prime Rate [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Delinquent Payments, Basis Spread on Variable Rate				5.00%
Minimum [Member] | Prime Rate [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate During Period				5.00%
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