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Note 13 - Commitments and Contingencies (Details Textual) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Aug. 31, 2016 shares | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Jul. 01, 2018 USD ($) a
Area of Leased Facility | a |  |  |  | 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 |  | 956,535 | $ 351,418 |
Defined Contribution Plan, Employer Discretionary Contribution Amount |  | 130,511 | 196,239 |
Bonuses and Related Payroll Tax Expense [Member] |  |  |  |
Increase (Decrease) in Other Employee-Related Liabilities |  | $ 1,205,099 | $ 1,100,693 |
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 |  |  |

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