CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014
SALES
Product	$ 55,044	$ 59,822
Service	14,895	13,552
Total sales	69,939	73,374
COST OF SALES
Product	22,177	25,153
Service	8,151	8,138
Total cost of sales (exclusive of depreciation and amortization, shown separately below)	30,328	33,291
GROSS PROFIT	39,611	40,083
OPERATING EXPENSES:
Selling and marketing	19,105	17,433
General and administrative	9,801	8,413
Depreciation and amortization	2,493	1,847
Research and development	6,356	5,430
Total operating expenses	37,755	33,123
INCOME FROM OPERATIONS	1,856	6,960
OTHER (INCOME) EXPENSE
Interest income	(19)	(17)
Other expense, net	1,307	160
INCOME BEFORE INCOME TAX (BENEFIT) EXPENSE	568	6,817
INCOME TAX (BENEFIT) EXPENSE	(96)	1,841
NET INCOME	$ 664	$ 4,976
NET INCOME PER SHARE - BASIC	$ 0.04	$ 0.29
NET INCOME PER SHARE - DILUTED	$ 0.04	$ 0.29
Weighted average shares - Basic	17,335,464	17,205,892
Weighted average shares - Diluted	17,511,821	17,364,373