CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
SALES
Product	$ 57,803	$ 67,581	$ 182,284	$ 194,785
Service	14,704	14,658	43,937	42,888
Total sales	72,507	82,239	226,221	237,673
COST OF SALES
Product	28,943	26,640	80,652	78,185
Service	8,693	9,558	26,541	27,847
Total cost of sales (exclusive of depreciation and amortization, shown separately below)	37,636	36,198	107,193	106,032
GROSS PROFIT	34,871	46,041	119,028	131,641
OPERATING EXPENSES:
Selling and marketing	18,944	19,059	58,112	56,207
General and administrative	8,239	8,832	27,106	26,112
Depreciation and amortization	2,790	1,805	8,022	5,520
Research and development	5,820	7,352	19,430	19,440
Total operating expenses	35,793	37,048	112,670	107,279
(LOSS) INCOME FROM OPERATIONS	(922)	8,993	6,358	24,362
OTHER (INCOME) EXPENSE
Interest expense (income), net	7	(23)	(36)	(61)
Other expense (income), net	131	(89)	1,521	(78)
(LOSS) INCOME BEFORE INCOME TAX (BENEFIT) EXPENSE	(1,060)	9,105	4,873	24,501
INCOME TAX (BENEFIT) EXPENSE	(176)	(2,118)	945	1,974
NET (LOSS) INCOME	$ (884)	$ 11,223	$ 3,928	$ 22,527
NET (LOSS) INCOME PER SHARE - BASIC	$ (0.05)	$ 0.65	$ 0.23	$ 1.31
NET (LOSS) INCOME PER SHARE - DILUTED	$ (0.05)	$ 0.64	$ 0.22	$ 1.29
Weighted average shares - Basic	17,395,824	17,258,029	17,372,562	17,233,879
Weighted average shares - Diluted	17,395,824	17,410,391	17,496,190	17,396,788