Shareholders' Equity (Deficit): Reconciliation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Reconciliation
BALANCE			$ (7,852,000)
BALANCE (in shares)			4,165,769
Repurchase of common stock			$ (49,904,100)
Stock options exercised, net of shares surrendered			1,329,200
Compensation expense relating to stock options			1,462,500
Cash dividends			(1,343,800)
Comprehensive income	$ 5,718,600	$ 6,098,400	16,918,500	$ 16,077,000
BALANCE	$ (39,389,700)		$ (39,389,700)
BALANCE (in shares)	3,821,528		3,821,528
Common Stock
Reconciliation
BALANCE (in shares)			4,165,769
Repurchase of common stock (in shares)			(400,000)
Stock options exercised, net of shares surrendered (in shares)			55,759
BALANCE (in shares)	3,821,528		3,821,528