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Note 6- Leases (Details Textual) |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 31, 2021 USD ($) ft² a | Sep. 30, 2021 USD ($) ft² | Sep. 30, 2020 USD ($) | Mar. 01, 2022 USD ($) | Feb. 12, 2020 ft² | Jun. 30, 2019 ft² | Jan. 01, 2015
Operating Lease, Right-of-Use Asset |  | $ 2,305,413 | $ 2,539,100 |  |  |  |
Operating Lease, Weighted Average Remaining Lease Term (Year) |  | 3 years 1 month 2 days | 3 years 11 months 26 days |  |  |  |
Operating Lease, Weighted Average Discount Rate, Percent |  | 3.41% | 3.48% |  |  |  |
Operating Lease, Payments |  | $ 1,289,982 | $ 812,107 |  |  |  |
Operating Lease, Liability, Total |  | $ 2,529,934 |  |  |  |  |
7050 Winnetka Avenue North, Brooklyn Park, Minnesota [Member] |  |  |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² |  | 71,000 |  |  |  | 14,000 |
Lessee, Operating Lease, Term of Contract (Year) |  |  |  |  |  |  | 10 years 2 months 1 day
Operating Lease Termination Fee |  | $ 249,000 |  |  |  |  |
Tijuana, Mexico [Member] |  |  |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 46,000 |  |  |  |  |  |
Lessee, Operating Lease, Term of Contract (Year) | 3 years |  |  |  |  |  |
Tijuana, Mexico 2 [Member] |  |  |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² |  |  |  |  | 52,000 |  |
Lessee, Operating Lease, Term of Contract (Year) |  |  |  |  | 42 months |  |
Lessee, Operating Lease, Number of Options to Renew |  |  |  |  | 2 |  |
Lessee, Operating Lease, Renewal Term (Year) |  |  |  |  | 3 years |  |
Tijuana, Mexico 3 [Member] |  |  |  |  |  |  |
Area of Real Estate Property (Square Foot) | a | 318,000 |  |  |  |  |  |
Lessee, Operating Lease, Number of Options to Renew | 2 |  |  |  |  |  |
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract (Year) | 7 years |  |  |  |  |  |
Lessee, Operating Lease, Lease Not yet Commenced, Renewal Term (Year) | 5 years |  |  |  |  |  |
Operating Lease, Monthly Payment | $ 162,232 |  |  |  |  |  |
Operating Lease, Payments, Increase, Percentage | 2.00% |  |  |  |  |  |
Tijuana, Mexico 3 [Member] | Forecast [Member] |  |  |  |  |  |  |
Operating Lease, Right-of-Use Asset |  |  |  | $ 9,432,000 |  |  |
Operating Lease, Liability, Total |  |  |  | $ 9,432,000 |  |  |
Tijuana, Mexico 3 [Member] | Lease Mandatory Contractual Term [Member] |  |  |  |  |  |  |
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract (Year) | 5 years |  |  |  |  |  |

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