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Shareholders' Equity (Deficit): Additional Information (Details) - Stock options - USD ($)	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Additional disclosures
Total intrinsic value of options exercised	$ 8,300,000	$ 7,700,000	$ 4,800,000
Total fair value of shares vested	$ 7,800,000	$ 7,300,000	$ 6,900,000
Shares of previously owned common stock surrendered as payment for option shares exercised	2,249	2,927	2,973
Compensation expense	$ 1,976,100	$ 1,956,600	$ 1,776,600
Total unrecognized compensation expense	$ 4,400,000
Weighted average period for recognition of unrecognized compensation expense	2 years 7 months 6 days

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested options awarded to employees as compensation.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Represents the number of shares surrendered during the period by options holders as payment for stock options exercised during the period.

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