CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)
Operating revenues	$ 38,979	$ 51,164
Operating costs:
Operating expenses	29,016	40,856
General and administrative	3,674	4,544
Depreciation and amortization	4,904	6,081
Total cost and expenses	37,594	51,481
Income (loss) from operations	1,385	(317)
Other income (expense):
Interest income	105	142
Interest expense	(40)	(158)
Other (expense) income, net	(458)	196
Income (loss) before income tax	992	(137)
Income tax benefit	1
Net income (loss)	993	(137)
Other comprehensive (loss) income:
Net unrealized (loss) income on foreign exchange rate translation, net	(1,199)	209
Comprehensive (loss) income	$ (206)	$ 72
Basic income (loss) per share of common stock	$ 0.04	$ (0.01)
Diluted income (loss) per share of common stock	$ 0.04	$ (0.01)
Weighted average equivalent common shares outstanding	23,287,410	23,057,546
Weighted average equivalent common shares outstanding - assuming dilution	23,465,651	23,057,546