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13. MAJOR CUSTOMERS AND VENDORS - Digital currency mining segment major customers (Details) - Customer Concentration Risk [Member] - Accounts Receivable [Member]	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Mining Pool Operator A [Member]
Concentration Risk, Percentage	99.87%	0.00%
Mining Pool Operator B [Member]
Concentration Risk, Percentage	0.13%	100.00%

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- Definition

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.

+ References

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