Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Income Statement [Abstract]
Operating revenues	$ 56,446	$ 53,996
Operating costs	48,530	47,063
Gross profit	7,916	6,933
Operating costs and expenses:
Selling, general, and administrative expenses	9,317	10,030
Goodwill impairment		2,086
Operating loss	(1,401)	(5,183)
Other income (expense)
Interest expense, net	(31)	(22)
Other income (expense), net	49	(356)
Loss before income taxes	(1,383)	(5,561)
Provision for federal and state income taxes	(83)	(110)
Net loss	$ (1,466)	$ (5,671)
Basic and diluted loss per common share	$ (0.05)	$ (0.21)
Basic and diluted weighted average shares used in computing loss per share:	27,414,000	27,510,000