Selected Quarterly Financial Data (unaudited) (Tables)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data

Selected quarterly financial data for years ended December 31, 2013 and 2012 follows (in thousands):

	Quarter Ended
	March 31,		June 30,		September 30,		December 31,
	2013		2013		2013		2013
Net sales	$	30,434	$	32,175	$	35,197	$	40,025
Gross margin		18,451		19,742		22,096		25,554
Net income		3,298		4,457		5,114		5,375
Basic net income per share	$	0.06	$	0.09	$	0.10	$	0.10
Diluted net income per share		0.06		0.08		0.10		0.10
	Quarter Ended
	March 31, 2012		June 30, 2012		September 30, 2012		December 31, 2012
Net sales	$	25,641	$	28,223	$	28,773	$	32,116
Gross margin		15,241		16,503		16,803		19,168
Net income		3,804		3,442		3,677		3,815
Basic net income per share	$	0.07	$	0.06	$	0.07	$	0.07
Diluted net income per share		0.07		0.06		0.07		0.07