Provision for Taxes - Components of the net deferred tax assets liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Assets
Employee benefits	$ 55	$ 30
Valuation reserves	779	615
Stock based compensation	208	179
Federal and state credits	347	297
Net operating loss carry forward	0	1
Total assets	1,389	1,122
Liabilities
Property and equipment	(470)	(532)
Goodwill and intangible assets	(4,278)	(3,812)
Prepaid insurance	(178)	(187)
Total liabilities	(4,926)	(4,531)
Valuation Allowance
Beginning balance	0	(160)
Decrease during period	0	160
Ending balance	0	0
Deferred Tax Liabilities, Net	$ (3,537)	$ (3,409)