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ORGANIZATION AND OPERATIONS OF THE COMPANY - Business Combination, Income Taxes and Recent Accounting Pronouncements (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 29, 2017
Dec. 27, 2019
Dec. 28, 2018
Dec. 31, 2017
Dec. 29, 2017
Income Taxes          
U.S. federal statutory rate (as a percent)   21.00% 21.00% 35.00% 34.00%
Deferred tax expense $ 1,300,000   $ 200,000    
Valuation reserve related to California net operating losses   $ 86,000 $ 86,000