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Related-Party Transactions	12 Months Ended
Related-Party Transactions	Dec. 31, 2022
Related Party Transactions [Abstract]
Related-Party Transactions	10. Related-Party Transactions Resource Holdings Associates (Resource Holdings) provides AWAC and Air Wisconsin with financial advisory and management services pursuant to an agreement entered into in January 2012. AWAC paid a total of $240 to Resource Holdings for each of the years ended December 31, 2022 and December 31, 2021, plus the reimbursement of certain out-of-pocket expenses. In June 2021, the board of directors agreed to require Harbor to pay Resource Holdings an annual fee of $150, payable monthly, which amount is in addition to the amount paid to Resource Holdings by AWAC. Harbor paid an aggregate of $150 and $113 to Resource Holdings for the years ended December 31, 2022 and December 31, 2021, respectively. For additional information, refer to the section entitled “ Certain Relationships and Related Transactions, and Director Independence ” within this Annual Report.