CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS
Operating Revenues	$ 86,100	$ 145,773
Operating costs:
Operating expenses	68,998	123,024
General and administrative	13,920	17,169
Depreciation and amortization	17,174	21,826
Total cost and expenses	100,092	162,019
Loss from operations	(13,992)	(16,246)
Other income (expense):
Interest income	402	548
Interest expense	(83)	(435)
Other income (expense), net	501	681
Loss before income tax	(13,172)	(15,452)
Income tax (expense) benefit:
Current	(14)	216
Deferred	(10)	23
Income tax (expense) benefit	(24)	239
Net loss	(13,196)	(15,213)
Other comprehensive income:
Net unrealized income on foreign exchange rate translation, net	372	392
Comprehensive loss	$ (12,824)	$ (14,821)
Basic loss per share of common stock	$ (0.56)	$ (0.66)
Diluted loss per share of common stock	$ (0.56)	$ (0.66)
Weighted average equivalent common shares outstanding	23,382,433	23,179,257
Weighted average equivalent common shares outstanding - assuming dilution	23,382,433	23,179,257