16. MAJOR CUSTOMERS AND VENDORS - Energy segment major suppliers (Details)	12 Months Ended
Sep. 30, 2021	Sep. 30, 2020
Energy Vendor A [Member]
Concentration Risk, Percentage	32.20%	85.55%
Energy Vendor B [Member]
Concentration Risk, Percentage	23.40%	0.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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