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Principal Business Activity and Significant Accounting Policies - Finite-lived Intangible Assets (Details)
12 Months Ended
Dec. 31, 2021
Internal use software  
Finite-Lived Intangible Assets [Line Items]  
Acquired finite-lived intangible assets, weighted average useful life 3 years
Website development costs  
Finite-Lived Intangible Assets [Line Items]  
Acquired finite-lived intangible assets, weighted average useful life 3 years