Condensed Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
SALES
Product	$ 67,581	$ 55,014	$ 194,785	$ 162,670
Service	14,658	13,176	42,888	39,219
Total sales	82,239	68,190	237,673	201,889
COST OF SALES
Product	26,640	21,372	78,185	65,632
Service	9,558	7,997	27,847	23,685
Total cost of sales (exclusive of depreciation and amortization, shown separately below)	36,198	29,369	106,032	89,317
GROSS PROFIT	46,041	38,821	131,641	112,572
OPERATING EXPENSES
Selling and marketing	19,059	16,366	56,207	49,732
General and administrative	8,832	7,275	26,112	22,616
Depreciation and amortization	1,805	1,699	5,520	5,268
Research and development	7,352	5,884	19,440	16,171
Total operating expenses	37,048	31,224	107,279	93,787
INCOME FROM OPERATIONS	8,993	7,597	24,362	18,785
OTHER (INCOME) EXPENSE, net
Interest income	(28)	(19)	(67)	(54)
Other (income) expense, net	(89)	809	(78)	1,428
Interest expense	5	2	6	3
INCOME (LOSS) BEFORE INCOME TAX (BENEFIT) EXPENSE	9,105	6,805	24,501	17,408
INCOME TAX (BENEFIT) EXPENSE	(2,118)	1,763	1,974	4,161
NET INCOME	$ 11,223	$ 5,042	$ 22,527	$ 13,247
NET INCOME PER SHARE - BASIC	$ 0.65	$ 0.29	$ 1.31	$ 0.78
NET INCOME PER SHARE - DILUTED	$ 0.64	$ 0.29	$ 1.29	$ 0.77
Weighted average shares - Basic	17,258,029	17,095,066	17,233,879	17,053,223
Weighted average shares - Diluted	17,410,391	17,185,380	17,396,788	17,191,407