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13. MAJOR CUSTOMERS AND VENDORS - Digital currency mining segment major suppliers (Details) - Customer Concentration Risk [Member] - Accounts Receivable [Member]
3 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Mining Vendor A [Member]    
Concentration Risk, Percentage 67.93% 0.00%
Mining Vendor B [Member]    
Concentration Risk, Percentage 32.07% 0.00%