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CONDENSED UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 02, 2017	Apr. 03, 2016
Income Statement [Abstract]
Revenue	$ 3,170	$ 2,950
Cost of revenue	1,797	1,794
Gross profit	1,373	1,156
Operating expenses:
Research and development	2,427	3,447
Selling, general and administrative	2,414	2,693
Total operating expenses	4,841	6,140
Loss from operations	(3,468)	(4,984)
Interest expense	(61)	(38)
Interest income and other (expense), net	0	(7)
Loss before income taxes	(3,529)	(5,029)
Provision for income taxes	36	64
Net loss	$ (3,565)	$ (5,093)
Net loss per share:
Basic (in dollars per share)	$ (0.05)	$ (0.09)
Diluted (in dollars per share)	$ (0.05)	$ (0.09)
Weighted average shares:
Basic (in shares)	68,794	58,371
Diluted (in shares)	68,794	58,371

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