SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

Selected Unaudited Quarterly Financial Data

Selected unaudited quarterly financial data were as follows for the years ended December 31:

	2020
	Quarter ended March 31,		Quarter ended June 30,		Quarter ended September 30,		Quarter ended December 31,
Net sales	$	73,564	$	43,203	$	55,281	$	57,113
Gross profit	$	24,470	$	6,604	$	13,593	$	12,186
Net income (loss)	$	4,155	$	(5,648)	$	1,008	$	(927)
Net income (loss) per share
Basic	$	0.28	$	(0.38)	$	0.07	$	(0.06)
Diluted	$	0.28	$	(0.38)	$	0.07	$	(0.06)

	2019
	Quarter ended March 31,		Quarter ended June 30,		Quarter ended September 30,		Quarter ended December 31,
Net sales	$	100,135	$	110,954	$	100,094	$	86,367
Gross profit	$	36,405	$	42,073	$	36,224	$	30,221
Net income (loss)	$	15,170	$	17,244	$	6,915	$	(5,288)
Net income (loss) per share
Basic	$	1.02	$	1.17	$	0.47	$	(0.36)
Diluted	$	1.01	$	1.15	$	0.46	$	(0.36)