Annual report pursuant to Section 13 and 15(d)

Basis of Presentation and Summary of Significant Accounting Policies - Segment reporting (Details)

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Basis of Presentation and Summary of Significant Accounting Policies - Segment reporting (Details)
12 Months Ended
Dec. 31, 2021
segment
Basis of Presentation and Summary of Significant Accounting Policies  
Number of operating segment 1
Number of reportable segments 1