CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS
Operating revenues	$ 22,961			$ 7,429			$ 72,588	$ 34,128
Operating costs:
Operating expenses	24,144			8,650			67,832	29,838
General and administrative	2,495			2,975			8,971	11,671
Depreciation and amortization	2,014			2,861			6,827	8,972
Total cost and expenses	28,653			14,486			83,630	50,481
Income (loss) from operations	(5,692)			(7,057)			(11,042)	(16,353)
Other income (expense):
Interest income	192			91			436	147
Interest expense	(22)			(4)			(53)	(24)
Other income (expense), net	327			42			522	354
Income (loss) before income tax	(5,195)			(6,928)			(10,137)	(15,876)
Income tax benefit (expense):	(3)			16			96
Net income (loss)	(5,198)	$ (4,430)	$ (413)	(6,912)	$ (7,579)	$ (1,385)	(10,041)	(15,876)
Other comprehensive income (loss):
Net unrealized income (loss) on foreign exchange rate translation	(218)			(566)			25	(1,238)
Comprehensive income (loss)	$ (5,416)			$ (7,478)			$ (10,016)	$ (17,114)
Basic income (loss) per share of common stock (in dollars per share)	$ (0.20)			$ (0.28)			$ (0.40)	$ (0.64)
Diluted income (loss) per share of common stock (in dollars per share)	$ (0.20)			$ (0.28)			$ (0.40)	$ (0.64)
Weighted average equivalent common shares outstanding (in shares)	26,137,648			25,000,564			25,383,757	24,904,495
Weighted average equivalent common shares outstanding - assuming dilution (in shares)	26,137,648			25,000,564			25,383,757	24,904,495