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INTANGIBLES - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Indefinite-Lived Intangible Assets [Line Items]    
Intangible asset amortization expense $ 61 $ 49
Intangible asset - Part 135 certificate 1,200 1,363
Gain from sale of consolidated entity 387 0
Impairment of certificates 0 $ 0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Fly Dreams, LLC    
Indefinite-Lived Intangible Assets [Line Items]    
Intangible asset carrying value 163  
Selling price 550  
Gain from sale of consolidated entity $ 387