Commitments and Contingencies	6 Months Ended
Jun. 30, 2025
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings From time to time, the Company is involved in various legal proceedings, regulatory matters, and other disputes or claims arising from or related to claims incident to the normal course of the Company’s business activities, including with respect to intellectual property, employment, regulatory and contractual matters. Although the results of such legal proceedings, regulatory matters and other disputes or claims cannot be predicted with certainty, as of June 30, 2025, the Company believed that it was not a party to any legal proceedings, regulatory matters, or other disputes or claims for which a material loss was considered probable and for which the amount (or range) of loss was reasonably estimable. However, regardless of the merit of the matters raised or the ultimate outcome, legal proceedings, regulatory matters, and other disputes or claims may have an adverse impact on the Company as a result of adverse determinations, defense and settlement costs, diversion of management’s time and resources, and other factors. Prior to its termination, a dispute arose under a capacity purchase agreement (the “United capacity purchase agreement”) with United Airlines, Inc. (“United”) which was resolved by arbitration and the issuance of an award (the “United Arbitration Award”) in February 2024. The arbitrators denied Air Wisconsin’s claims that United owed it amounts under the United capacity purchase agreement and denied United’s claims that Air Wisconsin breached the agreement by terminating it and that Air Wisconsin owed it damages. As a result, neither party owed to the other party any amounts claimed in the arbitration. The Company and certain of its officers and directors were named as defendants in several lawsuits relating to facts arising in connection with the restatement of its previously issued consolidated financial statement for the year ended December 31, 2022, as well as the interim unaudited condensed consolidated financial statements for the first three quarters of the years ended December 31, 2022 and December 31, 2023. One of those matters was a consolidated putative class action complaint captioned Toft v. Harbor Diversified, Inc., et al., No. 24-C-556 (E.D. Wisc. 2024) (the “Class Action”). On January 31, 2025, the court dismissed the operative complaint for failure to state a claim upon which relief could be granted. Defendants subsequently moved for sanctions under Rule 11 of the Federal Rules of Civil Procedure against the plaintiffs and their law firms, including the Rosen Law Firm. On December 3, 2025, the court granted the motion for sanctions with respect to the Rosen Law Firm, finding that its complaint against the Company was frivolous, and entered judgment in favor of the defendants. On May 14, 2026, the court ordered the Rosen Law Firm to pay approximately $287 in attorneys’ fees and costs as the award to the defendants for the Rule 11 violation. In 2024, three stockholders each filed a stockholder derivative action against certain officers and directors of the Company alleging breach of fiduciary duty, among other claims, arising from allegations substantively similar to those raised in the Class Action. Two of those actions were consolidated in an action captioned In re Harbor Diversified, Inc. Shareholder Derivative Litigation, No. 24-C-903 (E.D. Wisc. 2024), and the other action is captioned Cooke v. Bartlett et. al., No. 24-934-MN (D. Del. 2024). Neither action substantively moved forward while the parties awaited a decision on the motion to dismiss in the Class Action. Following the dismissal of the Class Action, on March 12, 2026, the court entered a dismissal without prejudice in the Wisconsin consolidated action pursuant to the stipulation of the parties. The plaintiff in the Delaware action filed a notice of dismissal, which was entered by the court on March 25, 2026. Treasury Payroll Support Program Audit Beginning in April 2020, Air Wisconsin entered into a series of agreements with respect to payroll support from the U.S. Department of Treasury (“Treasury”) under a program provided by the Coronavirus Aid, Relief, and Economic Security Act. Under the first of those agreements, Air Wisconsin received approximately $42,185. In September 2020, the Treasury commenced a routine audit in connection with Air Wisconsin’s receipt of funds under that agreement. Although Treasury's review of payments made to Air Wisconsin may be ongoing, Air Wisconsin does not believe that it will be required to repay any amount to the Treasury. Standby Letters of Credit As of June 30, 2025, Air Wisconsin had six outstanding letters of credit in the aggregate amount of $287 to guarantee the performance of its obligations under certain lease agreements, airport agreements and insurance policies. As of June 30, 2025, Air Wisconsin maintained a credit facility with a borrowing capacity of $290 for the issuance of such letters of credit as needed to support its operations. A significant portion of Air Wisconsin’s restricted cash balance secures the credit facility. The obligations supported by these letters of credit remained with Air Wisconsin following the Aviation Disposition.

From time to time, the Company is involved in various legal proceedings, regulatory matters, and other disputes or claims arising from or related to claims incident to the normal course of the Company’s business activities, including with respect to intellectual property, employment, regulatory and contractual matters. Although the results of such legal proceedings, regulatory matters and other disputes or claims cannot be predicted with certainty, as of June 30, 2025, the Company believed that it was not a party to any legal proceedings, regulatory matters, or other disputes or claims for which a material loss was considered probable and for which the amount (or range) of loss was reasonably estimable. However, regardless of the merit of the matters raised or the ultimate outcome, legal proceedings, regulatory matters, and other disputes or

Prior to its termination, a dispute arose under a capacity purchase agreement (the “United capacity purchase agreement”) with United Airlines, Inc. (“United”) which was resolved by arbitration and the issuance of an award (the “United Arbitration Award”) in February 2024. The arbitrators denied Air Wisconsin’s claims that United owed it amounts under the United capacity purchase agreement and denied United’s claims that Air Wisconsin breached the agreement by terminating it and that Air Wisconsin owed it damages. As a result, neither party owed to the other party any amounts claimed in the arbitration.

The Company and certain of its officers and directors were named as defendants in several lawsuits relating to facts arising in connection with the restatement of its previously issued consolidated financial statement for the year ended December 31, 2022, as well as the interim unaudited condensed consolidated financial statements for the first three quarters of the years ended December 31, 2022 and December 31, 2023. One of those matters was a consolidated putative class action complaint captioned Toft v. Harbor Diversified, Inc., et al., No. 24-C-556 (E.D. Wisc. 2024) (the “Class Action”). On January 31, 2025, the court dismissed the operative complaint for failure to state a claim upon which relief could be granted. Defendants subsequently moved for sanctions under Rule 11 of the Federal Rules of Civil Procedure against the plaintiffs and their law firms, including the Rosen Law Firm. On December 3, 2025, the court granted the motion for sanctions with respect to the Rosen Law Firm, finding that its complaint against the Company was frivolous, and entered judgment in favor of the defendants. On May 14, 2026, the court ordered the Rosen Law Firm to pay approximately $287 in attorneys’ fees and costs as the award to the defendants for the Rule 11 violation.

In 2024, three stockholders each filed a stockholder derivative action against certain officers and directors of the Company alleging breach of fiduciary duty, among other claims, arising from allegations substantively similar to those raised in the Class Action. Two of those actions were consolidated in an action captioned In re Harbor Diversified, Inc. Shareholder Derivative Litigation, No. 24-C-903 (E.D. Wisc. 2024), and the other action is captioned Cooke v. Bartlett et. al., No. 24-934-MN (D. Del. 2024). Neither action substantively moved forward while the parties awaited a decision on the motion to dismiss in the Class Action. Following the dismissal of the Class Action, on March 12, 2026, the court entered a dismissal without prejudice in the Wisconsin consolidated action pursuant to the stipulation of the parties. The plaintiff in the Delaware action filed a notice of dismissal, which was entered by the court on March 25, 2026.

Beginning in April 2020, Air Wisconsin entered into a series of agreements with respect to payroll support from the U.S. Department of Treasury (“Treasury”) under a program provided by the Coronavirus Aid, Relief, and Economic Security Act. Under the first of those agreements, Air Wisconsin received approximately $42,185. In September 2020, the Treasury commenced a routine audit in connection with Air Wisconsin’s receipt of funds under that agreement. Although Treasury's review of payments made to Air Wisconsin may be ongoing, Air Wisconsin does not believe that it will be required to repay any amount to the Treasury.

As of June 30, 2025, Air Wisconsin had six outstanding letters of credit in the aggregate amount of $287 to guarantee the performance of its obligations under certain lease agreements, airport agreements and insurance policies. As of June 30, 2025, Air Wisconsin maintained a credit facility with a borrowing capacity of $290 for the issuance of such letters of credit as needed to support its operations. A significant portion of Air Wisconsin’s restricted cash balance secures the credit facility. The obligations supported by these letters of credit remained with Air Wisconsin following the Aviation Disposition.