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Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Condensed Consolidated Statements Of Operations
Net revenues	$ 8,426	$ 11,404	$ 17,305	$ 20,830
Cost of sales	7,944	10,760	16,444	19,506
Gross profit	482	644	861	1,324
Operating expenses:
Research and development	783	1,487	1,791	2,983
Intellectual property legal fees	1,388	915	3,599	1,381
Selling, general and administrative	1,585	1,951	3,276	3,865
Total operating expenses	3,756	4,353	8,666	8,229
Operating loss	(3,274)	(3,709)	(7,805)	(6,905)
Other expense, net:
Interest expense, net	(133)	(138)	(280)	(286)
Other (expense) income, net	(10)		(5)	2
Total other expense, net	(143)	(138)	(285)	(284)
Loss before provision for income taxes	(3,417)	(3,847)	(8,090)	(7,189)
Net loss	$ (3,417)	$ (3,847)	$ (8,090)	$ (7,189)
Net loss per common share:
Basic and diluted	$ (0.04)	$ (0.06)	$ (0.09)	$ (0.12)
Weighted-average common shares outstanding:
Basic and diluted	91,685	61,844	87,073	61,763

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