Consolidated Statements Of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
SALES
Product	$ 49,274	$ 54,032	$ 159,130	$ 146,682
Service	11,460	10,775	33,595	30,402
Total Sales	60,734	64,807	192,725	177,084
COST OF SALES
Product	21,107	21,605	63,933	56,527
Service	7,323	6,813	22,242	20,380
Total Cost of Sales (exclusive of depreciation and amortization, shown separately below)	28,430	28,418	86,175	76,907
GROSS PROFIT	32,304	36,389	106,550	100,177
OPERATING EXPENSES:
Selling	14,154	14,696	46,033	44,157
General and administrative	7,266	6,424	22,028	19,931
Depreciation and amortization	1,796	1,711	5,164	5,047
Research and development	4,065	3,591	12,998	11,037
Total operating expenses	27,281	26,422	86,223	80,172
INCOME FROM OPERATIONS	5,023	9,967	20,327	20,005
OTHER (INCOME) EXPENSE
Interest income	(20)	(19)	(141)	(84)
Other (income) expense, net	(46)	780	215	775
Interest expense	2	2	22	33
INCOME BEFORE INCOME TAX EXPENSE	5,087	9,204	20,231	19,281
INCOME TAX EXPENSE	1,414	2,775	5,074	5,376
NET INCOME	$ 3,673	$ 6,429	$ 15,157	$ 13,905
NET INCOME PER SHARE - BASIC	$ 0.22	$ 0.39	$ 0.90	$ 0.85
NET INCOME PER SHARE - DILUTED	$ 0.21	$ 0.38	$ 0.88	$ 0.83
Weighted average shares - Basic	16,944,120	16,609,005	16,892,338	16,435,337
Weighted average shares - Diluted	17,094,102	16,849,282	17,148,555	16,788,776