Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues:
Revenues	$ 103,776	$ 92,263	$ 280,790	$ 255,336
Operating expenses:
Voyage expenses	42,967	31,475	127,789	78,551
Vessel operating expenses	24,711	25,155	72,260	72,642
Charter hire expenses	5,475	723	12,743	1,231
General and administrative expenses (inclusive of nonvested stock amortization expense of $575, $644, $1,596 and $1,776, respectively)	6,144	5,033	18,253	16,761
Technical management fees	1,885	2,028	5,710	5,926
Depreciation and amortization	18,184	17,269	54,532	50,605
Impairment of vessel assets	12,182	0	26,078	56,586
Gain on sale of vessels		(1,509)	(611)	(1,509)
Total operating expenses	111,548	80,174	316,754	280,793
Operating (loss) income	(7,772)	12,089	(35,964)	(25,457)
Other (expense) income:
Other income	86	213	523	272
Interest income	892	1,062	3,292	2,743
Interest expense	(7,797)	(7,656)	(24,496)	(24,249)
Impairment of right-of-use asset			(223)
Loss on debt extinguishment				(4,533)
Other expense	(6,819)	(6,381)	(20,904)	(25,767)
Net (loss) income	$ (14,591)	$ 5,708	$ (56,868)	$ (51,224)
Net (loss) earnings per share-basic	$ (0.35)	$ 0.14	$ (1.36)	$ (1.37)
Net (loss) earnings per share-diluted	$ (0.35)	$ 0.14	$ (1.36)	$ (1.37)
Weighted average common shares outstanding-basic	41,749,200	41,618,187	41,739,287	37,263,200
Weighted average common shares outstanding-diluted	41,749,200	41,821,008	41,739,287	37,263,200
Voyage
Revenues:
Revenues	$ 103,776	$ 92,263	$ 280,790	$ 255,336