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Organization and nature of business (Detail Textuals) - USD ($) | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Feb. 23, 2018 | Feb. 21, 2018 | Sep. 30, 2018 | Nov. 24, 2016 | Oct. 24, 2016 | Aug. 10, 2016 | Jul. 05, 2016
Organization And Nature Of Business [Line Items] |  |  |  |  |  |  |
Gross proceeds from initial public offering |  |  | $ 7,728,000 |  |  |  |
IPO |  |  |  |  |  |  |
Organization And Nature Of Business [Line Items] |  |  |  |  |  |  |
Number of ordinary shares |  | 1,680,000 |  |  |  |  |
Initial public offering price |  | $ 4.00 |  |  |  |  |
Gross proceeds from initial public offering |  | $ 6,720,000 |  |  |  |  |
Net proceeds from initial public offering |  | $ 5,374,341 |  |  |  |  |
Option granted term |  | 45 days |  |  |  |  |
IPO | Underwriter |  |  |  |  |  |  |
Organization And Nature Of Business [Line Items] |  |  |  |  |  |  |
Number of ordinary shares |  | 252,000 |  |  |  |  |
FMI | Zhengyu Wang |  |  |  |  |  |  |
Organization And Nature Of Business [Line Items] |  |  |  |  |  |  |
% of Ownership |  |  |  |  | 100.00% |  |
Forest Food | Zhengyu Wang |  |  |  |  |  |  |
Organization And Nature Of Business [Line Items] |  |  |  |  |  |  |
% of Ownership |  |  |  | 96.15% |  |  |
China |  |  |  |  |  |  |
Organization And Nature Of Business [Line Items] |  |  |  |  |  |  |
Percentage of product sold |  |  | 91.00% |  |  |  |
International |  |  |  |  |  |  |
Organization And Nature Of Business [Line Items] |  |  |  |  |  |  |
Percentage of product sold |  |  | 9.00% |  |  |  |
National Trust Co., Ltd | Forest Food |  |  |  |  |  |  |
Organization And Nature Of Business [Line Items] |  |  |  |  |  |  |
Remaining percentage of ownership equity interest |  |  |  |  | 3.85% |  |
View Trade Securities, Inc. | IPO |  |  |  |  |  |  |
Organization And Nature Of Business [Line Items] |  |  |  |  |  |  |
Number of ordinary shares | 252,000 |  |  |  |  |  |
Initial public offering price | $ 4.00 |  |  |  |  |  |
Gross proceeds from initial public offering | $ 1,008,000 |  |  |  |  |  |
Net proceeds from initial public offering | $ 927,330 |  |  |  |  |  |
Suyuan Agriculture Technology Co., Ltd | Farmmi Enterprise | Zhengyu Wang |  |  |  |  |  |  |
Organization And Nature Of Business [Line Items] |  |  |  |  |  |  |
Percentage of ownership interest |  |  |  |  |  |  | 50.00%
Suyuan Agriculture Technology Co., Ltd | Farmmi Technology | Zhengyu Wang |  |  |  |  |  |  |
Organization And Nature Of Business [Line Items] |  |  |  |  |  |  |
Percentage of ownership interest |  |  |  |  |  | 50.00% |
Suyuan Agriculture Technology Co., Ltd | FLS Mushroom | Zhengyu Wang |  |  |  |  |  |  |
Organization And Nature Of Business [Line Items] |  |  |  |  |  |  |
% of Ownership |  |  |  |  | 100.00% |  |

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