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
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Number of vendors 1 3
Inventory, percentage 15.00% 96.00%