Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Consolidated Statements of Operations
Revenues	$ 60,548	$ 47,677	$ 94,328	$ 84,027
Cost of sales	38,720	34,996	63,362	62,999
Gross profit	21,828	12,681	30,966	21,028
Operating expenses:
Selling, general and administrative	6,766	6,757	13,514	14,022
Amortization	699	716	1,397	1,432
Total operating expenses	7,465	7,473	14,911	15,454
Operating income	14,363	5,208	16,055	5,574
Other expense:
Net interest expense	2,872	3,132	5,689	6,446
Other (income) expenses	5	(8)	5	(11)
Total other expense	2,877	3,124	5,694	6,435
Income (loss) before income taxes	11,486	2,084	10,361	(861)
Income tax expense (benefit)	209	(302)	160	(362)
Net income (loss)	$ 11,277	$ 2,386	$ 10,201	$ (499)
Net income (loss) per common share - Basic	$ 0.26	$ 0.06	$ 0.23	$ (0.01)
Net income (loss) per common share - Diluted	$ 0.24	$ 0.06	$ 0.22	$ (0.01)
Weighted average number of shares outstanding - Basic	43,498,908	42,628,560	43,426,463	42,628,560
Weighted average number of shares outstanding - Diluted	46,418,807	42,917,562	45,844,545	42,628,560