Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentrations (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentrations (Details) - item
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Number of vendors 5 2
Inventory, percentage 39.00% 39.00%