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Supplemental Balance Sheet Disclosures - Intangible assets (Details) - USD ($) | Mar. 31, 2025 | Sep. 30, 2024 | Jul. 22, 2024
--- | --- | --- | ---
Finite-Lived Intangible Assets, Net |  |  |
Accumulated Impairment | $ (44,400) | $ (44,400) |
Accumulated Amortization | (3,208,304) | (2,098,146) |
Intangible Assets, Net (Excluding Goodwill) |  |  |
Gross Carrying Value | 27,940,833 | 29,154,838 |
Accumulated Impairment | (44,400) | (44,400) |
Accumulated Amortization | (3,208,304) | (2,098,146) |
Net Carrying Value | 24,688,129 | 27,012,292 |
Customer relationships |  |  |
Finite-Lived Intangible Assets, Net |  |  |
Gross Carrying Value | 12,604,327 | 13,008,332 |
Accumulated Amortization | (2,085,019) | (1,459,861) |
Total | $ 10,519,308 | 11,548,471 |
Estimated weighted average life | 10 years |  |
Intangible Assets, Net (Excluding Goodwill) |  |  |
Accumulated Amortization | $ (2,085,019) | (1,459,861) |
Backlog |  |  |
Finite-Lived Intangible Assets, Net |  |  |
Gross Carrying Value | 4,850,000 | 6,310,000 |
Accumulated Amortization | (485,000) |  |
Total | $ 4,365,000 | 6,310,000 |
Estimated weighted average life | 4 years |  |
Intangible Assets, Net (Excluding Goodwill) |  |  |
Accumulated Amortization | $ (485,000) |  |
Licensing and certification rights |  |  |
Finite-Lived Intangible Assets, Net |  |  |
Gross Carrying Value | 696,506 | 696,506 |
Accumulated Impairment | (44,400) | (44,400) |
Accumulated Amortization | (638,285) | (638,285) |
Total | 13,821 | 13,821 |
Intangible Assets, Net (Excluding Goodwill) |  |  |
Accumulated Impairment | (44,400) | (44,400) |
Accumulated Amortization | (638,285) | (638,285) |
Customer Relationships and Backlog |  |  |
Finite-Lived Intangible Assets, Net |  |  |
Total | 14,884,308 |  |
Licensing and certification rights |  |  |
Indefinite-Lived Intangible Assets (Excluding Goodwill) |  |  |
Gross Carrying Value | $ 9,790,000 | $ 9,140,000 |
Honeywell International, Inc | Customer Relationships and Backlog |  |  |
Intangible Assets, Net (Excluding Goodwill) |  |  |
Net Carrying Value |  |  | $ 430,000
Honeywell International, Inc | License agreement |  |  |
Intangible Assets, Net (Excluding Goodwill) |  |  |
Net Carrying Value |  |  | $ 1,240,000

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