Related-Party Transactions |
12 Months Ended |
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Dec. 31, 2025 | |
| Related Party Transactions [Abstract] | |
| Related-Party Transactions | Related-Party Transactions Resource Holdings Resource Holdings Associates (“Resource Holdings”) is owned and controlled by individuals who are current or former directors, managers, and/or employees of the Company or its subsidiaries. Resource Holdings provides AWAC and Air Wisconsin with financial advisory and management services pursuant to an agreement entered into in January 2012. AWAC paid an aggregate of $240 to Resource Holdings for each of the years ended December 31, 2025 and December 31, 2024, respectively, for these services, plus the reimbursement of certain out-of-pocket expenses. In June 2021, Harbor agreed to pay Resource Holdings an annual fee of $150, payable monthly, for financial advisory and management services, which amount is in addition to the amount paid to Resource Holdings by AWAC. Harbor paid an aggregate of $150 to Resource Holdings for each of the years ended December 31, 2025 and December 31, 2024, for these services, plus the reimbursement of certain out-of-pocket expenses. These amounts are included in Purchased services and other on the consolidated statements of operations. Southshore Aircraft Holdings Southshore Aircraft Holdings, LLC (“Southshore”) is owned and controlled by individuals who are current or former directors, managers, and/or employees of the Company or its subsidiaries. In January 2020, the Company completed an acquisition from Southshore of regional jets and engines, in exchange for the issuance of 4,000,000 shares of Harbor's Series C Convertible Redeemable Preferred Stock (the “Series C Preferred”). On June 28, 2024, Southshore converted its Series C Preferred into 16,500,000 shares of Harbor's common stock. For additional information, please refer to Note 11, Income (Loss) Per Share and Equity.
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