CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 28, 2015
SALES
Product	$ 59,312	$ 55,044
Service	16,436	14,895
Total sales	75,748	69,939
COST OF SALES
Product	24,008	22,177
Service	9,067	8,151
Total cost of sales (exclusive of depreciation and amortization, shown separately below)	33,075	30,328
GROSS PROFIT	42,673	39,611
OPERATING EXPENSES:
Selling and marketing	17,625	19,105
General and administrative	10,541	9,801
Depreciation and amortization	3,086	2,493
Research and development	7,091	6,356
Total operating expenses	38,343	37,755
INCOME FROM OPERATIONS	4,330	1,856
OTHER (INCOME) EXPENSE
Interest income	(44)	(19)
Other expense, net	751	1,307
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT)	3,623	568
INCOME TAX EXPENSE (BENEFIT)	543	(96)
NET INCOME	$ 3,080	$ 664
NET INCOME PER SHARE - BASIC	$ 0.19	$ 0.04
NET INCOME PER SHARE - DILUTED	$ 0.19	$ 0.04
Weighted average shares - Basic	16,609,084	17,335,464
Weighted average shares - Diluted	16,638,458	17,511,821