CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Net revenues:
Systems and components	$ 74,342	$ 68,072	$ 54,463
Technology development	5,782	7,088	11,087
Total net revenues	80,124	75,160	65,550
Cost of net revenues:
Systems and components	45,263	43,700	40,284
Technology development	4,452	5,143	7,833
Total cost of net revenues	49,715	48,843	48,117
Gross profit	30,409	26,317	17,433
Operating expenses:
Research and development	18,156	15,661	15,832
Selling, general and administrative	19,916	19,638	21,205
Acquisition-related (benefit), net	(100)	(244)	(250)
Total operating expenses	37,972	35,055	36,787
Operating loss	(7,563)	(8,738)	(19,354)
Interest income	195	179	179
Other income (expense), net	178	(52)	158
Income (loss) before income taxes	(7,190)	(8,611)	(19,017)
Provision for income taxes	251	555	8,428
Net loss	$ (7,441)	$ (9,166)	$ (27,445)
Net loss per share:
Basic and diluted	$ (0.36)	$ (0.41)	$ (1.16)
Weighted average shares outstanding:
Basic and diluted	20,761	22,218	23,671