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Unaudited Condensed Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 29, 2024
Oct. 01, 2023
Sep. 29, 2024
Oct. 01, 2023
Revenue $ 4,273 $ 6,665 $ 14,407 $ 13,719
Cost of revenue 1,888 1,537 5,934 4,998
Gross profit 2,385 5,128 8,473 8,721
Operating expenses:        
Research and development 1,954 1,933 4,940 5,067
Selling, general and administrative 2,292 1,915 6,738 5,700
Total operating expenses 4,246 3,848 11,678 10,767
Operating income (loss) (1,861) 1,280 (3,205) (2,046)
Interest expense (186) (48) (295) (156)
Interest income and other income (expense), net (34) (36) (22) (99)
Income (loss) before income taxes (2,081) 1,196 (3,522) (2,301)
(Benefit from) provision for income taxes 13 4 14 4
Net income (loss) $ (2,094) $ 1,192 $ (3,536) $ (2,305) [1]
Net income (loss) per share:        
Basic (in dollars per share) $ (0.14) $ 0.09 $ (0.25) $ (0.17)
Diluted (in dollars per share) $ (0.14) $ 0.08 $ (0.25) $ (0.17)
Weighted average shares outstanding:        
Basic (in shares) 14,555 13,859 14,390 13,377
Diluted (in shares) 14,555 14,131 14,390 13,377
[1] As revised. Refer to Note 2 for further information.