Organization, Business and Summary of Significant Accounting Policies: (Details 6) (USD $)	3 Months Ended								12 Months Ended
	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 24, 2011	Jun. 25, 2011	Mar. 26, 2011	Dec. 29, 2012	Dec. 31, 2011
Earnings per common share
Anti-dilutive options excluded from computation of diluted earnings per share (in shares)									281,017	215,500
Basic Earnings Per Share:
Net income	$ 2,364,000	$ 1,740,000	$ 1,623,000	$ 1,722,000	$ 742,000	$ (191,000)	$ 860,000	$ 1,406,000	$ 7,448,634	$ 2,816,837
Weighted average number of common shares	19,074,588	19,030,959	18,898,698	18,281,736	18,212,534	18,139,674	18,067,391	18,010,668	18,821,495	18,109,548
Earnings (loss) per common share (in dollars per share)	$ 0.12	$ 0.09	$ 0.09	$ 0.09	$ 0.04	$ (0.01)	$ 0.05	$ 0.08	$ 0.40	$ 0.16
Diluted Earnings Per Share:
Net income (loss)									$ 7,448,634	$ 2,816,837
Weighted average number of common shares	19,074,588	19,030,959	18,898,698	18,281,736	18,212,534	18,139,674	18,067,391	18,010,668	18,821,495	18,109,548
Incremental shares from assumed conversions of stock options and non-vested shares of restricted stock									752,038	1,089,320
Adjusted weighted average number of common shares	19,683,937	19,689,985	19,555,437	19,364,774	19,274,115	18,139,674	18,719,203	18,698,392	19,573,533	19,198,868
Earnings (loss) per common share (in dollars per share)	$ 0.12	$ 0.09	$ 0.08	$ 0.09	$ 0.04	$ (0.01)	$ 0.05	$ 0.08	$ 0.38	$ 0.15