Quarterly Financial Data (unaudited)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (unaudited)

14. Quarterly Financial Data (unaudited)

	Three months ended
2017	March 31		June 30		September 30		December 31
	(in thousands, except per share data)
Total net sales	$	24,139	$	25,753	$	24,822	$	26,153
Gross profit		17,353		17,516		17,577		18,251
Income (loss) from operations		4,193		5,536		5,053		6,321
Net income		3,219		4,632		5,042		4,284
Earnings per share
Basic	$	0.17	$	0.25	$	0.26	$	0.22
Diluted	$	0.16	$	0.23	$	0.25	$	0.21
	Three months ended
2016	March 31		June 30		September 30		December 31
	(in thousands, except per share data)
Total net sales	$	20,258	$	22,389	$	23,216	$	23,288
Gross profit		14,356		15,367		17,019		16,194
Income (loss) from operations		3,300		3,783		5,344		3,909
Net income (loss)		2,166		2,598		3,229		2,597
Earnings per share
Basic	$	0.12	$	0.14	$	0.17	$	0.14
Diluted	$	0.11	$	0.14	$	0.17	$	0.13