v3.25.1
Loss Per Unit (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 29, 2025
Mar. 30, 2024
Class A Units [Member]    
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]    
Income attributable to USPB available to unitholders (numerator) $ (1,058) $ (69)
Weighted average outstanding units, Basic 735,385 735,385
Weighted average outstanding units, Diluted 735,385 735,385
Income per unit, Basic $ (1.44) $ (0.09)
Income per unit, Diluted $ (1.44) $ (0.09)
Class B Units [Member]    
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]    
Income attributable to USPB available to unitholders (numerator) $ (9,524) $ (622)
Weighted average outstanding units, Basic 755,385 755,385
Weighted average outstanding units, Diluted 755,385 755,385
Income per unit, Basic $ (12.61) $ (0.82)
Income per unit, Diluted $ (12.61) $ (0.82)