Federal and State Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019
Current:
State	$ 103	$ 83
Total current	103	83
Deferred:
Federal	(25)	(55)
State	25	55
Total deferred	0	0
Total income tax benefit	$ 103	$ 83