Line of credit (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	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	$ 165,000
Line of Credit Facility, Periodic Payment, Interest		$ 36,849	$ 17,353
Line of Credit Facility, Interest Rate at Period End			6.24%
Repayments of Lines of Credit	$ 201,575
Accrued expenses			$ 656,707	762,032
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