Cash and Receivables Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018
Allowance for Doubtful Accounts Receivable
Balance at beginning of period; accounts receivable	$ 3,314	$ 4,939	$ 4,546
Provision for doubtful accounts; accounts receivable	647	(1,618)	606
Uncollectible accounts written off, net of recoveries; accounts receivable	222	7	213
Balance at end of period; accounts receivable	3,739	3,314	4,939
Balance at beginning of period; notes receivable	6,705	2,000	0
Provision for doubtful accounts; notes receivable	206	4,912	1,956
Uncollectible accounts written off, net of recoveries; notes receivable	1,286	207	(44)
Balance at end of period; notes receivable	5,625	6,705	2,000
Balance at beginning of period; total	10,019	6,939	4,546
Provision for doubtful accounts; total	853	3,294	2,562
Uncollectible accounts written off, net of recoveries; total	1,508	214	169
Balance at end of period; total	$ 9,364	$ 10,019	$ 6,939