Earnings Per Share - Summary of computation of basic and diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 27, 2024	Sep. 29, 2023	Sep. 27, 2024	Sep. 29, 2023
Numerator:
Net (loss) income attributable to Shimmick Corporation	$ (1,564)	$ 34,567	$ (86,286)	$ 14,930
Numerator for basic and diluted EPS	$ (1,564)	$ 34,567	$ (86,286)	$ 14,930
Denominator:
Denominator for basic EPS - weighted average shares	33,723	21,914	29,127	21,910
Effect of dilutive securities:
Employee stock options	0	0	0	0
Restricted stock units	0	0	0	0
Dilutive potential common shares	0	0	0	0
Denominator for diluted EPS - adjusted weighted average shares and assumed conversions	33,723	21,914	29,127	21,910
Basic EPS:
Basic earnings per common share	$ (0.05)	$ 1.58	$ (2.96)	$ 0.68
Diluted EPS:
Diluted earnings per common share	$ (0.05)	$ 1.58	$ (2.96)	$ 0.68

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