Annual report pursuant to Section 13 and 15(d)

Income Taxes - Valuation and Unrecognized (Details)

v3.20.4
Income Taxes - Valuation and Unrecognized (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 26, 2019
Dec. 27, 2018
Income Taxes [Line Items]      
State net operating losses $ (207,205,000) $ (150,380,000) $ (122,384,000)
Valuation allowance 0 0  
State and Local Jurisdiction      
Income Taxes [Line Items]      
State net operating losses 100,000 $ 700,000  
Net operating losses available to reduce future income taxes $ 3,000,000.0