Organization and Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2015

Accounting Policies [Abstract]

Net Sales by Geographic Area

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

	Three Months Ended June 30,								Six Months Ended June 30,
	2015				2014				2015				2014
United States	$	38,695	82.8	%	$	32,155	86.5	%	$	74,196	81.1	%	$	57,731	78.7	%
Other Countries	8,018		17.2		5,020		13.5		17,279		18.9		15,629		21.3
Total	$	46,713	100.0	%	$	37,175	100.0	%	$	91,475	100.0	%	$	73,360	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 June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Numerator for basic and diluted earnings per share:
Net income	$	6,103	$	3,884	$	13,308	$	7,275
Denominator:
Weighted average shares outstanding - basic	53,644		53,383		53,407		53,287
Dilutive effect of stock-based awards	1,156		1,372		1,255		1,641
Diluted weighted average shares outstanding	54,800		54,755		54,662		54,928
Anti-dilutive stock-based awards excluded	153		361		173		309
Net income per common share:
Basic	$	0.11	$	0.07	$	0.25	$	0.14
Diluted	$	0.11	$	0.07	$	0.24	$	0.13

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,
	2015			2014
Balance, beginning of period	$	675		$	955
Utilization of accrual	(200		)	(303		)
Warranty (recovery) expense	(19		)	426
Balance, end of period	$	456		$	1,078