Consolidated Statements Of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
SALES
Product	$ 55,432	$ 49,692	$ 109,856	$ 92,650
Service	11,330	10,019	22,135	19,627
Total Sales	66,762	59,711	131,991	112,277
COST OF SALES
Product	22,320	19,349	42,826	34,922
Service	7,382	6,846	14,919	13,567
Total Cost of Sales (exclusive of depreciation and amortization, shown separately below)	29,702	26,195	57,745	48,489
GROSS PROFIT	37,060	33,516	74,246	63,788
OPERATING EXPENSES:
Selling	15,841	15,309	31,879	29,461
General and administrative	8,134	6,917	14,762	13,507
Depreciation and amortization	1,689	1,722	3,368	3,336
Research and development	4,525	3,814	8,933	7,446
Total operating expenses	30,189	27,762	58,942	53,750
INCOME FROM OPERATIONS	6,871	5,754	15,304	10,038
OTHER (INCOME) EXPENSE
Interest income	(20)	(39)	(121)	(65)
Other (income) expense, net	401	124	261	(5)
Interest expense	7	2	20	31
INCOME BEFORE INCOME TAX EXPENSE	6,483	5,667	15,144	10,077
INCOME TAX EXPENSE	1,749	1,434	3,660	2,601
NET INCOME	$ 4,734	$ 4,233	$ 11,484	$ 7,476
NET INCOME PER SHARE - BASIC	$ 0.28	$ 0.26	$ 0.68	$ 0.46
NET INCOME PER SHARE - DILUTED	$ 0.28	$ 0.25	$ 0.67	$ 0.45
Weighted average shares - Basic	16,921,012	16,448,229	16,861,221	16,349,190
Weighted average shares - Diluted	17,140,115	16,845,877	17,157,185	16,724,019