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Shareholders equity (Details Narrative) - USD ($) |  | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 13, 2022 | Jan. 18, 2024 | Jan. 31, 2023 | Sep. 27, 2022 | Sep. 30, 2024 | Sep. 30, 2023 | Mar. 13, 2023 | Jan. 30, 2023 | Dec. 30, 2022 | Nov. 11, 2022
Description of share consolidation |  | On January 18, 2024, the Company consolidated its issued and outstanding ordinary shares from 70,449,781 Class A ordinary shares of no par value and 3,020,969 Class B ordinary shares of no par value to 2,348,326 Class A ordinary shares of no par value and 100,698 Class B ordinary shares of no par value, on a 30:1 basis. As a result of reverse share split, 250 Class A ordinary shares were acquired from the market and were cancelled accordingly |  |  |  |  |  |  |  |
Unsecured convertible note principal amount |  |  |  |  |  |  |  |  | $ 3,230,000 |
Interest rate |  |  |  |  |  |  |  |  | 7.00% |
Statutory reserves |  |  |  |  | $ 14,990,000,000 | $ 500,000 |  |  |  |
Restricted stock issued |  |  |  |  |  |  | 66,667 |  |  |
CN Energy [Member] |  |  |  |  |  |  |  |  |  |
Underwriting agreement, Description |  |  | public offering (the “Offering”) (i) 10,396,974 units, each consisting of one Class A ordinary share, no par value (collectively, the “Class A ordinary shares”) and one warrant, each exercisable to purchase one Class A ordinary share at an exercise price of $0.55 (or $1.4529 after the reverse share split) per share (collectively, the “warrants”), at an offering price of $0.55 per unit; and (ii) 7,786,300 units, each consisting of one pre-funded warrant, each exercisable to purchase one Class A ordinary share at an exercise price of $0.0001 per share (collectively, the “Pre-funded Warrants”), and one warrant, at an offering price of $0.5499 per unit (together with the Class A ordinary shares and the warrants, the “Offered Securities”), to those purchasers whose purchase of Class A ordinary shares in the Offering would otherwise result in the purchaser, together with its affiliates and certain related parties, beneficially owning more than 4.99% (or, at the election of the holder, 9.99%) of CN Energy’s outstanding ordinary shares immediately following the consummation of the Offering. The components of the units were issued separately and are immediately separable upon issuance |  |  |  |  |  |  |
Proceeds from the Offering |  |  | $ 7,800,000 |  |  |  |  |  |  |
Common Class A [Member] |  |  |  |  |  |  |  |  |  |
Number of ordinary shares issued |  |  |  |  | 6,812,261 | 2,285,826 |  |  |  |
Number of ordinary shares outstanding |  |  |  |  | 6,812,261 | 2,285,826 |  |  |  |
Number of Warrants outstanding |  |  |  |  | 6,783,337 | 6,883,337 |  |  |  |
Pre-funded Warrants exercised |  |  |  |  |  | 103,735 |  | 4,672,700 |  |
Conversion of ordinary shares |  |  |  |  |  | 103,735 |  |  |  |
Pre-funded Warrants outstanding |  |  |  |  | 1,554 | 1,554 |  | 4,672,700 |  |
Warrants exercise price |  | $ 1.4529 |  |  |  |  |  |  |  |
Warrants |  | 18,183,274 |  |  |  |  |  |  |  |
Warrants adjuted for reverse share split |  | 6,883,337 |  |  |  |  |  |  |  |
Number of warrants exercised |  |  |  |  | 100,000 | 0 |  |  |  |
Number of warrants exercised, value |  |  |  |  | $ 145,290 | $ 0 |  |  |  |
Common Class A [Member] | Private Placement [Member] | CN Energy [Member] |  |  |  |  |  |  |  |  |  |
Issuance of ordinary shares for private placement, net, shares | 350,467 |  |  |  |  |  |  |  |  |
Proceeds from private placement | $ 18,000,000 |  |  |  |  |  |  |  |  |
Common Class A [Member] | Private Placement [Member] |  |  |  |  |  |  |  |  |  |
Issuance of ordinary shares for private placement, net, shares |  |  |  | 10,514,018 |  |  |  |  |  |
Purchase price of ordinary shares |  |  |  | $ 1.712 |  |  |  |  |  |
Proceeds from private placement |  |  |  | $ 18,000,000 |  |  |  |  |  |
Common Class A [Member] | Issuance of Ordinary Shares for Acquisition [Member] |  |  |  |  |  |  |  |  |  |
Number of ordinary shares issued |  |  |  |  |  |  |  |  |  | 293,984
Number of ordinary shares |  |  |  |  |  |  |  |  |  | $ 18,373,771
Purchase price |  |  |  |  |  |  |  |  |  | $ 17,706,575
Percentage of Ownership |  |  |  |  |  |  |  |  |  | 100.00%
Common Class A [Member] | Parent Company [Member] |  |  |  |  |  |  |  |  |  |
Number of ordinary shares issued |  |  |  |  | 4,426,685 | 299,896 |  |  |  |
Convertible note |  |  |  |  | $ 2,420,000 | $ 1,250,000 |  |  |  |
Conversion price |  |  |  |  |  | $ 0.12 |  |  |  |
Common Class B [Member] |  |  |  |  |  |  |  |  |  |
Number of ordinary shares issued |  |  |  |  | 100,698 | 100,698 |  |  |  |
Number of ordinary shares outstanding |  |  |  |  | 100,698 | 100,698 |  |  |  |

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