CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Net revenues:
Total net revenues	$ 24,827	$ 17,974
Cost of net revenues:
Total cost of net revenues	17,588	13,099
Gross profit	7,239	4,875
Operating expenses:
Research and development	3,986	4,167
Selling, general and administrative	5,252	5,829
Total operating expenses	9,238	9,996
Loss from operations	(1,999)	(5,121)
Interest income and other income (expense), net	160	145
Loss before income taxes	(1,839)	(4,976)
Provision for income taxes	553	160
Net loss	$ (2,392)	$ (5,136)
Net loss per share:
Basic and Diluted	$ (0.10)	$ (0.23)
Weighted average shares outstanding:
Basic and Diluted	22,855	22,107
Systems and components
Net revenues:
Total net revenues	$ 21,637	$ 15,472
Cost of net revenues:
Total cost of net revenues	15,100	10,728
Technology development
Net revenues:
Total net revenues	3,190	2,502
Cost of net revenues:
Total cost of net revenues	$ 2,488	$ 2,371