Organization and Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2014

Accounting Policies [Abstract]

Net Sales by Geographic Area

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

	Three Months Ended June 30,								Six Months Ended June 30,
	2014				2013				2014				2013
United States	$	32,155	86	%	$	27,239	85	%	$	57,731	79	%	$	54,554	87	%
Other Countries		5,020	14			4,936	15			15,629	21			8,055	13
Total	$	37,175	100	%	$	32,175	100	%	$	73,360	100	%	$	62,609	100	%

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 June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Numerator for basic and diluted earnings per share:
Net income	$	3,884	$	4,457	$	7,275	$	7,755
Denominator:
Weighted average shares outstanding—basic		53,383		51,109		53,287		51,923
Dilutive effect of stock-based awards		1,372		1,744		1,641		1,776
Diluted weighted average shares outstanding		54,755		52,853		54,928		53,699
Anti-dilutive stock-based awards excluded		361		1,235		309		1,234
Net income per common share:
Basic	$	0.07	$	0.09	$	0.14	$	0.15
Diluted	$	0.07	$	0.08	$	0.13	$	0.14

Summary of Changes in Estimated Product Warranty Liabilities

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

	Six Months Ended June 30,
	2014			2013
Balance, beginning of period	$	955		$	484
Utilization of accrual		(303	)		(295	)
Warranty expense		426			506
Balance, end of period	$	1,078		$	695