Details of Certain Balance Sheet Accounts - Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Sep. 28, 2019	Dec. 29, 2018
Accounts receivable, net:
Allowance for uncollectible accounts	$ (3,082)	$ (2,612)
Accounts receivable, net of allowances	50,655	50,735
Trade receivables
Accounts receivable, net:
Accounts receivable, gross	27,879	27,356
Credit card receivables
Accounts receivable, net:
Accounts receivable, gross	15,131	16,636
Tenant improvement allowances receivable
Accounts receivable, net:
Accounts receivable, gross	6,183	5,149
Other receivables
Accounts receivable, net:
Accounts receivable, gross	$ 4,544	$ 4,206