CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Net revenues:
Total net revenues	$ 108,885	$ 95,114
Cost of net revenues:
Total cost of net revenues	68,017	62,420
Gross profit	40,868	32,694
Operating expenses:
Research and development	14,309	16,862
Selling, general and administrative	22,627	20,188
Acquisition-related (benefit), net	7	(139)
Total operating expenses	36,943	36,911
Operating income (loss)	3,925	(4,217)
Interest income	574	516
Other income (expense), net	8	106
Income (loss) before income taxes	4,507	(3,595)
Provision for (benefit from) income taxes	3,359	(7,176)
Net loss	$ 1,148	$ 3,581
Net loss per share:
Basic	$ 0.05	$ 0.16
Diluted	$ 0.05	$ 0.16
Weighted average shares outstanding:
Basic	23,063	22,519
Diluted	23,340	22,904
Systems and components
Net revenues:
Total net revenues	$ 89,228	$ 85,320
Cost of net revenues:
Total cost of net revenues	55,678	53,334
Technology development
Net revenues:
Total net revenues	19,657	9,794
Cost of net revenues:
Total cost of net revenues	$ 12,339	$ 9,086