CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS
Operating revenues	$ 3,538	$ 1,914	$ 22,818	$ 13,855
Operating costs:
Operating expenses	6,357	3,975	23,008	18,247
General and administrative	2,556	2,443	10,502	7,996
Depreciation and amortization	2,373	3,249	7,458	10,083
Total cost and expenses	11,286	9,667	40,968	36,326
Loss from operations	(7,748)	(7,753)	(18,150)	(22,471)
Other income (expense):
Interest income	90	50	144	176
Interest expense	(4)	(4)	(24)	(16)
Other income (expense), net	43	(158)	358	201
Loss before income tax	(7,619)	(7,865)	(17,672)	(22,110)
Income tax benefit	16
Net loss	(7,603)	(7,865)	(17,672)	(22,110)
Other comprehensive (loss) income:
Net unrealized (loss) income on foreign exchange rate translation, net	(566)	(307)	(1,238)	105
Comprehensive loss	$ (8,169)	$ (8,172)	$ (18,910)	$ (22,005)
Basic loss per share of common stock	$ (0.32)	$ (0.33)	$ (0.74)	$ (0.94)
Diluted loss per share of common stock	$ (0.32)	$ (0.33)	$ (0.74)	$ (0.94)
Weighted average equivalent common shares outstanding	23,812,329	23,632,112	23,772,843	23,545,693
Weighted average equivalent common shares outstanding - assuming dilution	23,812,329	23,632,112	23,772,843	23,545,693