Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentrations (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentrations (Details) - item
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Number of vendors 2 3
Inventory, percentage 40.00% 100.00%