16. MAJOR CUSTOMERS AND VENDORS - Digital currency mining segment major suppliers (Details)	12 Months Ended
Sep. 30, 2021
Mining Vendor A [Member]
Concentration Risk, Percentage	49.90%
Mining Vendor B [Member]
Concentration Risk, Percentage	37.40%
Mining Vendor C [Member]
Concentration Risk, Percentage	2.80%

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.

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