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Summary of significant accounting policies (Tables)
9 Months Ended
Sep. 30, 2021
Accounting Policies [Abstract]  
Schedule of estimated useful lives of intangible assets
Intangible assets acquired individually or with a group of other assets or in a business combination and developed internally are carried at cost less accumulated amortization and accumulated impairment loss based on their estimated useful lives as follows:
 
Customer-related intangible assets1-11 years
Marketing-related intangible assets1-10 years
Technology-related intangible assets2-8 years