Federal and State Income Taxes (Details 2) - USD ($) $ in Thousands	Dec. 26, 2020	Dec. 28, 2019
Income Tax Disclosure [Abstract]
Federal and state net operating loss carryforward	$ 7,036	$ 7,145
Tax credit carryforwards	1,971	1,971
Allowance for uncollectible accounts	93	53
Accruals not yet deductible for tax purposes	613	352
Goodwill	364	485
Depreciation	3	7
Lease payable	390	488
Total noncurrent deferred tax assets	10,470	10,501
Less: valuation allowance	(10,016)	(9,912)
Total noncurrent deferred tax assets, net	454	589
Other	(70)	(107)
Right to use asset	(384)	(482)
Total noncurrent deferred tax liabilities	(454)	(589)
Net deferred tax assets/deferred tax liabilities	$ 0	$ 0