CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Net revenues:
Systems and components	$ 13,083	$ 18,646	$ 26,364	$ 36,728
Technology development	1,835	1,812	2,218	3,615
Total net revenues	14,918	20,458	28,582	40,343
Cost of net revenues:
Systems and components	7,514	11,487	16,465	23,072
Technology development	1,277	1,165	2,135	2,544
Total cost of net revenues	8,791	12,652	18,600	25,616
Gross profit	6,127	7,806	9,982	14,727
Operating expenses:
Research and development	4,977	2,947	10,154	7,555
Selling, general and administrative	4,957	4,576	9,952	9,829
Total operating expenses	9,934	7,523	20,106	17,384
Income (loss) from operations	(3,807)	283	(10,124)	(2,657)
Interest income and other income (expense), net	87	(13)	125	66
Income (loss) before income taxes	(3,720)	270	(9,999)	(2,591)
Provision for (benefit from) income taxes	(230)	258	(204)	290
Net income (loss)	$ (3,490)	$ 12	$ (9,795)	$ (2,881)
Net income (loss) per share:
Basic and diluted	$ (0.17)		$ (0.48)	$ (0.13)
Weighted average common shares outstanding:
Basic	20,691	22,630	20,621	22,929
Diluted	20,691	22,912	20,621	22,929