Organization and Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2015

Accounting Policies [Abstract]

Net Sales by Geographic Area

For the three and nine months ended September 30, 2015 and 2014, net sales by geographic area were as follows (in thousands):

	Three Months Ended September 30,								Nine Months Ended September 30,
	2015				2014				2015				2014
United States	$	43,689	86.7	%	$	37,605	84.8	%	$	117,885	83.1	%	$	95,336	81.0	%
Other Countries	6,687		13.3		6,744		15.2		23,966		16.9		22,373		19.0
Total	$	50,376	100.0	%	$	44,349	100.0	%	$	141,851	100.0	%	$	117,709	100.0	%

Weighted Average Number of Shares Outstanding and Income Per Share

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Numerator for basic and diluted earnings per share:
Net income	$	1,521	$	7,558	$	14,829	$	14,832
Denominator:
Weighted average shares outstanding - basic	53,709		52,475		53,509		53,013
Dilutive effect of stock-based awards	982		1,346		1,162		1,537
Diluted weighted average shares outstanding	54,691		53,821		54,671		54,550
Anti-dilutive stock-based awards excluded	160		336		160		328
Net income per common share:
Basic	$	0.03	$	0.14	$	0.28	$	0.28
Diluted	$	0.03	$	0.14	$	0.27	$	0.27

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,
	2015			2014
Balance, beginning of period	$	675		$	955
Utilization of accrual	(293		)	(646		)
Warranty expense	19			517
Balance, end of period	$	401		$	826