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SUPPLEMENTAL FINANCIAL STATEMENT DATA - Accured Liabilities (Details) - USD ($) $ in Thousands | Dec. 27, 2019 | Dec. 28, 2018
--- | --- | ---
ACCRUED LIABILITIES |  |
Accrued subcontractor costs | $ 45,366 | $ 21,446
Accrued bonuses | 7,756 | 5,273
Other | 4,630 | 2,489
Compensation and payroll taxes | 3,286 | 2,544
Employee withholdings | 3,463 | 2,137
Paid leave bank | 3,114 | 3,512
Total accrued liabilities | $ 67,615 | $ 37,401

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