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Unaudited Condensed Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 28, 2025
Sep. 29, 2024
Sep. 28, 2025
Sep. 29, 2024
Revenue $ 2,029 $ 4,209 $ 10,041 $ 13,974
Cost of revenue 2,501 1,721 7,682 5,440
Gross profit (loss) (472) 2,488 2,359 8,534
Operating expenses:        
Research and development 1,398 1,798 3,859 4,466
Selling, general and administrative 2,057 2,292 6,555 6,738
Impairment charges 0 0 300 0
Restructuring costs 0 0 75 0
Total operating expenses 3,455 4,090 10,789 11,204
Operating income (loss) (3,927) (1,602) (8,430) (2,670)
Interest expense (87) (187) (292) (295)
Interest income and other income (expense), net 9 (26) (28) (5)
Income (loss) from continuing operations before income taxes (4,005) (1,815) (8,750) (2,970)
(Benefit from) provision for income taxes (1) 13 5 14
Net income (loss) from continuing operations (4,004) (1,828) (8,755) (2,984)
Net income (loss) from discontinued operations, net of taxes (3) (266) (113) (552)
Net income (loss) $ (4,007) $ (2,094) $ (8,868) $ (3,536)
Net income (loss) from continuing operations per share:        
Basic (in dollars per share) $ (0.24) $ (0.13) $ (0.55) $ (0.21)
Diluted (in dollars per share) (0.24) (0.13) (0.55) (0.21)
Basic (in dollars per share) (0.24) (0.14) (0.56) (0.25)
Diluted (in dollars per share) $ (0.24) $ (0.14) $ (0.56) $ (0.25)
Weighted average shares outstanding:        
Basic (in shares) 16,516 14,555 15,957 14,390
Diluted (in shares) 16,516 14,555 15,957 14,390