Note 13 - Commitments and Contingencies (Details Textual)		12 Months Ended
	Jul. 01, 2018 USD ($) ft²	Sep. 30, 2019 USD ($) shares	Sep. 30, 2018 USD ($)
Area of Leased Facility | ft²	54,766
Operating Leases, Average Monthly Payments Due, Current	$ 36,146
Operating Leases, Average Monthly Payments, Due in Second Year	74,460
Operating Leases, Average Monthly Payments, Due in Third Year	76,694
Operating Leases, Average Monthly Payments, Due in Fourth Year	78,994
Operating Leases, Average Monthly Payments, Due in Fifth Year	81,364
Operating Leases, Average Monthly Payments, Due in Sixth Year	83,805
Operating Leases, Average Monthly Payments, Due in Seventh Year	86,319
Operating Leases, Average Monthly Payments, Due in Eighth Year	88,909
Operating Leases, Average Monthly Payments, Due in Ninth Year	91,576
Operating Leases, Average Monthly Payments, Due in Tenth Year	94,324
Allowance for Tenant Improvements	$ 1,588,214	$ 1,588,214
Operating Leases, Rent Expense, Net, Total		1,050,784	$ 956,535
Defined Contribution Plan, Employer Discretionary Contribution Amount		220,234	130,511
Bonuses and Related Payroll Tax Expense [Member]
Increase (Decrease) in Other Employee-Related Liabilities		$ 1,295,338	$ 1,205,099
Performance Shares [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vesting Upon Employee Termination and Change of Control, Number of Shares | shares		375,000