Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Condensed Consolidated Statements of Operations [Abstract]
Revenues	$ 70,708	$ 82,973
Cost of sales	77,557	83,569
Gross loss	(6,849)	(596)
Selling, general and administrative expenses	7,667	7,996
Operating loss	(14,516)	(8,592)
Interest expense and deferred financing costs	(36)	(32)
Other income	319	381
Loss before income taxes	(14,233)	(8,243)
Income tax benefit	(201)	(1,839)
Net loss	$ (14,032)	$ (6,404)
Net loss per common share - basic	$ (1.12)	$ (0.51)
Net loss per common share - diluted	$ (1.12)	$ (0.51)
Weighted average common shares outstanding - basic	12,337,013	12,306,011
Weighted average common shares outstanding - diluted	12,337,013	12,306,011
Dividends declared per common share