Organization and Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2014

Accounting Policies [Abstract]

Net Sales by Geographic Area

For the three and nine months ended September 30, 2014 and 2013, net sales by geographic area were as follows (dollars in thousands):

	Three Months Ended September 30,								Nine Months Ended September 30,
	2014				2013				2014				2013
United States	$	37,605	84.8	%	$	31,483	89.4	%	$	95,336	81.0	%	$	86,036	88.0	%
Other Countries		6,744	15.2			3,714	10.6			22,373	19.0			11,770	12.0
Total	$	44,349	100.0	%	$	35,197	100.0	%	$	117,709	100.0	%	$	97,806	100.0	%

Weighted Average Number of Shares Outstanding and Income Per Share

The calculation of the weighted average number of shares outstanding and income per share are as follows (in thousands, except per share data):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Numerator for basic and diluted earnings per share:
Net income	$	7,558	$	5,114	$	14,832	$	12,869
Denominator:
Weighted average shares outstanding — basic		52,475		51,342		53,013		51,727
Dilutive effect of stock-based awards		1,346		1,979		1,537		1,917
Diluted weighted average shares outstanding		53,821		53,321		54,550		53,644
Anti-dilutive stock-based awards excluded		336		565		328		898
Net income per common share:
Basic	$	0.14	$	0.10	$	0.28	$	0.25
Diluted	$	0.14	$	0.10	$	0.27	$	0.24

Summary of Changes in Estimated Product Warranty Liabilities

Changes in the Company’s estimated product warranty liabilities are as follows (in thousands):

	Nine Months Ended September 30,
	2014			2013
Balance, beginning of period,	$	955		$	484
Utilization of accrual		(646	)		(420	)
Warranty expense		517			644
Balance, end of period,	$	826		$	708