Quarterly Financial Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information

Quarterly financial information for the years ended December 31, 2018 and 2017 is presented below:

	Three Months Ended
	March 31, 2018				June 30, 2018				September 30, 2018				December 31, 2018
	As originally reported under LIFO		As adjusted under average cost		As originally reported under LIFO		As adjusted under average cost		As originally reported under LIFO		As adjusted under average cost
Net sales	$	122,454	$	122,454	$	172,890	$	172,890	$	167,094	$	167,094	$	164,531
Gross profit	$	22,028	$	22,192	$	32,514	$	33,063	$	29,602	$	31,303	$	30,601
Net (loss) income	$	(2,022)	$	(1,858)	$	4,940	$	5,434	$	4,971	$	6,408	$	(41,152)
Basic (loss) earnings per common share	$	(0.20)	$	(0.18)	$	0.48	$	0.52	$	0.48	$	0.62	$	(3.97)
Diluted (loss) earnings per common share	$	(0.20)	$	(0.18)	$	0.47	$	0.52	$	0.47	$	0.61	$	(3.97)

	Three Months Ended
	March 31, 2017				June 30, 2017				September 30, 2017				December 31, 2017
	As originally reported under LIFO		As adjusted under average cost		As originally reported under LIFO		As adjusted under average cost		As originally reported under LIFO		As adjusted under average cost		As originally reported under LIFO		As adjusted under average cost
Net sales	$	118,702	$	118,702	$	144,860	$	144,860	$	131,492	$	131,492	$	141,323	$	141,323
Gross profit	$	21,252	$	21,241	$	27,736	$	27,928	$	26,365	$	27,917	$	27,899	$	28,175
Net (loss) income	$	(2,422)	$	(2,433)	$	3,024	$	3,216	$	3,222	$	4,500	$	289	$	78
Basic (loss) earnings per common share	$	(0.23)	$	(0.24)	$	0.29	$	0.31	$	0.31	$	0.44	$	0.03	$	0.01
Diluted (loss) earnings per common share	$	(0.23)	$	(0.24)	$	0.29	$	0.31	$	0.31	$	0.43	$	0.03	$	0.01