Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Assets Retirement Obligations (Details)

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Summary of Significant Accounting Policies - Assets Retirement Obligations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
Balance as of beginning of period $ 3,720 $ 4,746
Additions and revisions of prior estimates 176 (385)
Accretion expense 136 146
Liabilities settled 0 (782)
Foreign currency translation adjustment (51) (5)
Asset retirement obligation as of end of period $ 3,981 $ 3,720