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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS    
Operating revenues $ 18,359 $ 11,748
Operating costs:    
Operating expenses 12,638 10,942
General and administrative 5,531 2,807
Depreciation and amortization 2,634 3,434
Total cost and expenses 20,803 17,183
Loss from operations (2,444) (5,435)
Other income (expense):    
Interest income 25 70
Interest expense (11) (6)
Other income (expense), net 39 143
Loss before income tax (2,391) (5,228)
Net loss (2,391) (5,228)
Other comprehensive (loss) income:    
Net unrealized (loss) income on foreign exchange rate translation, net (233) 201
Comprehensive loss $ (2,624) $ (5,027)
Basic loss per share of common stock $ (0.10) $ (0.22)
Diluted loss per share of common stock $ (0.10) $ (0.22)
Weighted average equivalent common shares outstanding 23,692,558 23,478,072
Weighted average equivalent common shares outstanding - assuming dilution 23,692,558 23,478,072