A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Represents the period after which the estimated unrecoverable portion of accounts is charged-off against the allowance for credit losses.

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Represents the minimum monthly payments owed to classify lease as non-accrual.

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Represents the threshold delinquent period of lease rentals to classify lease as non-accrual.

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Significant Accounting Policies: Balance Sheet Disclosures (Details)	12 Months Ended
	Dec. 30, 2017 USD ($) item	Dec. 31, 2016 USD ($)	Dec. 26, 2015 USD ($)	Dec. 27, 2014 USD ($)
Receivables
Allowance for Doubtful Accounts Receivable, Current	$ 400	$ 2,100	$ 200	$ 1,600
Restricted Cash
Restricted cash held in escrow	$ 90,000	40,000
Leasing Income Recognition
Threshold delinquent period of lease rentals to classify lease as non-accrual	90 days
Minimum monthly payments owed to classify lease as non-accrual \| item	3
Allowance for Credit Losses
Delinquent period for charging-off against allowance for credit losses	121 days
Canadian operations
Cash Equivalents
Cash located in banks	$ 8,700	$ 149,700