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Debt: Notes Payable (Details) - USD ($)	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Jul. 31, 2017	May 31, 2015
Notes Payable
Proceeds from the Note Agreement		$ 12,500,000
Notes Payable | Prudential Investment Management, Inc
Notes Payable
Principal amount outstanding	$ 28,900,000
Minimum prepayment	1,000,000
Series A Notes | Prudential Investment Management, Inc
Notes Payable
Principal amount outstanding	$ 18,000,000
Note payable, face amount				$ 25,000,000
Term of notes payable	10 years
Interest rate (as a percent)	5.50%
Quarterly principal payment, first five years	$ 500,000
Quarterly principal payment, thereafter	$ 750,000
Series B Notes | Prudential Investment Management, Inc
Notes Payable
Note payable, face amount			$ 12,500,000
Term of notes payable	10 years
Interest rate (as a percent)	5.10%
Quarterly principal payment	$ 312,500

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