Annual report pursuant to Section 13 and 15(d)

DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property and Equipment (Details)

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DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property and Equipment (Details)
12 Months Ended
Dec. 31, 2021
Minimum  
Property and equipment  
Estimated useful life 3 years
Maximum  
Property and equipment  
Estimated useful life 7 years