Goodwill and Intangible Assets - Acquired and Amortization (Details) - USD ($)	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Acquired identifiable intangible assets
Gross Carrying Amount	$ 8,500,000	$ 12,400,000
Accumulated Amortization	(4,319,000)	(7,292,000)
Net Carrying Amount	4,181,000	5,108,000
Impairment of intangible assets	0	0	$ 0
Amortization of expenses related to intangible assets	$ 900,000	1,400,000	$ 1,400,000
Non-competition agreements
Acquired identifiable intangible assets
Estimated useful life (in years)	5 years
Gross Carrying Amount	$ 280,000	280,000
Accumulated Amortization	(275,000)	(219,000)
Net Carrying Amount	5,000	61,000
Customer relationships
Acquired identifiable intangible assets
Gross Carrying Amount	8,220,000	12,120,000
Accumulated Amortization	(4,044,000)	(7,073,000)
Net Carrying Amount	$ 4,176,000	$ 5,047,000
Customer relationships | Minimum
Acquired identifiable intangible assets
Estimated useful life (in years)	8 years
Customer relationships | Maximum
Acquired identifiable intangible assets
Estimated useful life (in years)	10 years