Federal and State Income Taxes - Schedule of Deferred Tax Assets and (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
Income Tax Disclosure [Abstract]
Federal and state net operating loss carryforward	$ 6,531	$ 5,643
Tax credit carryforwards	1,971	2,085
Allowance for uncollectible accounts	46	159
Accruals not yet deductible for tax purposes	357	368
Goodwill	632	475
Depreciation	295	297
Total noncurrent deferred tax assets	9,832	9,027
Less: Valuation allowance	(9,710)	(8,854)
Total noncurrent deferred tax assets, net	122	173
Other	(122)	(173)
Total noncurrent deferred tax liabilities	(122)	(173)
Net deferred tax assets/deferred tax Liabilities