Quarterly Financial Data (unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

	Year Ended December 31, 2019
	Fourth Quarter		Third Quarter		Second Quarter		First Quarter
Sales	$	92,463	$	90,685	$	90,501	$	89,096
Cost of sales	70,903		71,895		70,979		72,436
Gross profit	21,560		18,790		19,522		16,660
SG&A expenses	5,309		7,186		8,648		8,147
Operating income	16,251		11,604		10,874		8,513
Interest expense, net	(368)		(364)		(321)		(252)
Income before income taxes	15,883		11,240		10,553		8,261
Income tax expense	2,936		3,025		2,642		(1,459)
Net income	$	12,947	$	8,215	$	7,911	$	9,720
Basic and diluted EPS data(a)	$	0.76	$	0.48	$	0.46	$	0.57

	Year Ended December 31, 2018
	Fourth Quarter		Third Quarter		Second Quarter		First Quarter
Sales	$	104,850	$	95,031	$	88,252	$	87,956
Cost of sales	79,242		75,432		68,811		69,005
Gross profit	25,608		19,599		19,441		18,951
SG&A expenses	8,996		7,584		8,309		8,562
Operating income	16,612		12,015		11,132		10,389
Interest expense, net	(338)		(334)		(289)		(207)
Income before income taxes	16,274		11,681		10,843		10,182
Income tax expense (benefit)	4,452		2,673		3,316		1,255
Net income	$	11,822	$	9,008	$	7,527	$	8,927
Basic and diluted EPS data(a)	$	0.69	$	0.52	$	0.44	$	0.52

(a)Quarterly EPS amounts may not add to amounts for the year because quarterly and annual EPS calculations are performed separately.