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Intangible assets (Tables) | 12 Months Ended
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Sep. 30, 2024
Intangible assets |
Summary of intangible assets other than goodwill | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | As of September 30, 2024
​ |  | Gross Carrying |  | Accumulated |  | Accumulated |  | Net Carrying
​ | ​ | Value |  | Impairment |  | Amortization |  | Value
License agreement (a) | ​ | $ | 9,140,000 | ​ | $ | — | ​ | $ | — | ​ | $ | 9,140,000
Customer relationships (a) | ​ |  | 13,008,332 | ​ |  | — | ​ |  | (1,459,861) | ​ |  | 11,548,471
Backlog (b) | ​ | ​ | 6,310,000 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 6,310,000
Licensing and certification rights (c) | ​ |  | 696,506 | ​ |  | (44,400) | ​ |  | (638,285) | ​ |  | 13,821
Total | ​ | $ | 29,154,838 | ​ | $ | (44,400) | ​ | $ | (2,098,146) | ​ | $ | 27,012,292
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of September 30, 2023
​ |  | Gross Carrying |  | Accumulated |  | Accumulated |  | Net Carrying
​ |  | Value |  | Impairment |  | Amortization |  | Value
License agreement (a) | ​ | $ | 5,700,000 | ​ | $ | — | ​ | $ | — | ​ | $ | 5,700,000
Customer relationships (a) | ​ |  | 10,740,000 | ​ |  | — | ​ |  | (268,500) | ​ |  | 10,471,500
Licensing and certification rights (c) | ​ |  | 696,506 | ​ |  | (44,400) | ​ |  | (638,285) | ​ |  | 13,821
Total | ​ | $ | 17,136,506 | ​ | $ | (44,400) | ​ | $ | (906,785) | ​ | $ | 16,185,321
​ ​
| (a) | As part of the September 2024 Honeywell Agreement, the July 2024 Honeywell Asset Acquisition, and the June 2023 Honeywell Agreement transactions, the Company acquired intangible assets related to the license agreements for the license rights to use certain Honeywell intellectual property, backlog and customer relationships. The license agreements have an indefinite life and is not subject to amortization; the customer relationships have an estimated weighted average life of ten years. The Company determined that the intangible assets were not impaired as of September 30, 2024 and September 30, 2023, respectively. As such, no impairment charges have been recorded for the fiscal years ended September 30, 2024 and 2023.
​
| (b) | As part of the September 2024 Honeywell Agreement, the Company acquired intangible assets related to backlog with a useful life between four to six years.
​
| (c) | The licensing, and certification rights are amortized over a defined number of units. An impairment charge of $44,400 was recorded during the fiscal year ended September 30, 2023. No impairment charges were recorded during the fiscal years ended September 30, 2024 or 2022.
Summary of expected future amortization expense related to the customer relationships | ​
​ | ​ | ​ | ​
Year |  | ​ | Amortization Expense
2025 | ​ | $ | 2,930,643
2026 | ​ | ​ | 2,930,643
2027 | ​ | ​ | 2,930,643
2028 | ​ | ​ | 2,930,643
2029 | ​ | ​ | 1,353,143
Thereafter | ​ | ​ | 4,782,756
Total | ​ | $ | 17,858,471
​

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- Definition Tabular disclosure of amortizable finite-lived intangible assets, in total and by major class, including the gross carrying amount and accumulated amortization, and indefinite-lived intangible assets not subject to amortization, excluding goodwill, in total and by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. + References No definition available. + Details
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- Definition Tabular disclosure of amortization expense of assets, excluding financial assets, that lack physical substance, having a limited useful life. + References No definition available. + Details
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- References No definition available. + Details
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