Subsequent Events	6 Months Ended
Jun. 30, 2025
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events The Company evaluated its condensed consolidated financial statements for the three months ended June 30, 2025 for subsequent events through June 26, 2026, the date the condensed consolidated financial statements were issued. The following subsequent events are noted: •On August 29, 2025, Air Wisconsin issued notices to all employees pursuant to the Worker Adjustment and Retraining Notification Act (“WARN”). No further workforce reductions were made pursuant to WARN and the notice period expired on December 31, 2025. •In December 2025, the Company entered into three related purchase agreements pursuant to which it sold its membership interests in Air Wisconsin and all of its other remaining aviation assets. The three agreements were interdependent and the closing of the transactions contemplated thereby occurred simultaneously on January 9, 2026. The aggregate consideration received in connection with these three agreements was $111,100, subject to certain customary purchase price adjustments and the impact of required tax obligations. Including the other sales, for which the Company received approximately $14,800 in aggregate consideration, the aggregate consideration received for the Aviation Disposition was approximately $125,900. After giving effect to the Aviation Disposition, the Company no longer has any material operating assets, is not engaged in any operating business, and does not have any source of revenue from operations. The Company's primary assets are comprised of cash and cash equivalents, restricted cash, and marketable securities. •In connection with the Aviation Disposition, on December 19, 2025, the Board of Managers of Air Wisconsin approved the termination of the SESP, which terminated on January 9, 2026. •In connection with the Aviation Disposition, Harbor's board of directors approved bonuses for certain officers and employees totaling, in the aggregate, approximately $4,300.

Subsequent Events

6 Months Ended

Jun. 30, 2025

The Company evaluated its condensed consolidated financial statements for the three months ended June 30, 2025 for subsequent events through June 26, 2026, the date the condensed consolidated financial statements were issued. The following subsequent events are noted:

•On August 29, 2025, Air Wisconsin issued notices to all employees pursuant to the Worker Adjustment and Retraining Notification Act (“WARN”). No further workforce reductions were made pursuant to WARN and the notice period expired on December 31, 2025.

•In December 2025, the Company entered into three related purchase agreements pursuant to which it sold its membership interests in Air Wisconsin and all of its other remaining aviation assets. The three agreements were interdependent and the closing of the transactions contemplated thereby occurred simultaneously on January 9, 2026. The aggregate consideration received in connection with these three agreements was $111,100, subject to certain customary purchase price adjustments and the impact of required tax obligations. Including the other sales, for which the Company received approximately $14,800 in aggregate consideration, the aggregate consideration received for the Aviation Disposition was approximately $125,900. After giving effect to the Aviation Disposition, the Company no longer has any material operating assets, is not engaged in any operating business, and does not have any source of revenue from operations. The Company's primary assets are comprised of cash and cash equivalents, restricted cash, and marketable securities.

•In connection with the Aviation Disposition, on December 19, 2025, the Board of Managers of Air Wisconsin approved the termination of the SESP, which terminated on January 9, 2026.

•In connection with the Aviation Disposition, Harbor's board of directors approved bonuses for certain officers and employees totaling, in the aggregate, approximately $4,300.