INCOME TAXES - Summary of income tax effects of temporary differences giving rise to deferred tax liabilities (Details) - USD ($) |
Dec. 31, 2019 |
Sep. 30, 2019 |
|---|---|---|
| Deferred income tax liabilities | ||
| Property and equipment | $ 2,404,986 | $ 2,539,639 |
| Other | (19,805) | (19,805) |
| Total deferred income tax liabilities | 2,385,181 | 2,519,834 |
| Deferred income tax assets | ||
| Other | 565,354 | 594,011 |
| Total deferred income tax assets | 565,354 | 594,011 |
| Total net deferred income tax liabilities | $ 1,819,827 | $ 1,925,823 |