CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Net revenues	$ 10,750	$ 7,998	$ 24,502	$ 22,605
Cost of net revenues	5,860	4,648	14,402	16,114
Gross profit	4,890	3,350	10,100	6,491
Operating expenses:
Research and development	3,311	2,908	10,339	9,392
Selling, general and administrative	4,741	4,273	13,007	12,805
Total operating expenses	8,052	7,181	23,346	22,197
Loss from operations	(3,162)	(3,831)	(13,246)	(15,706)
Interest income and other income (expense), net	413	25	723	75
Loss before provision for income taxes	(2,749)	(3,806)	(12,523)	(15,631)
Provision for income taxes	467	290	992	157
Net loss from continuing operations, net of taxes	(3,216)	(4,096)	(13,515)	(15,788)
Net loss from discontinued operations, net of taxes	(20)	(137)	(394)	(1,075)
Net loss	$ (3,236)	$ (4,233)	$ (13,909)	$ (16,863)
Net loss per share:
Basic – continuing operations	$ (0.13)	$ (0.17)	$ (0.54)	$ (0.65)
Diluted – continuing operations	(0.13)	(0.17)	(0.54)	(0.65)
Basic – discontinued operations	0	0	(0.02)	(0.04)
Diluted – discontinued operations	0	0	(0.02)	(0.04)
Basic – net loss	(0.13)	(0.17)	(0.55)	(0.69)
Diluted – net loss	$ (0.13)	$ (0.17)	$ (0.55)	$ (0.69)
Weighted average common shares outstanding:
Basic	25,370	24,522	25,104	24,265
Diluted	25,370	24,522	25,104	24,265