NATURE OF OPERATIONS AND ACCOUNTING POLICIES. (Details 6) (USD $)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Stock-Based Compensation
Stock-based compensation expense	$ 294,195	$ 451,203	$ 596,834
Weighted-average assumptions utilized to determine stock compensation expense relating to stock options
Maximum period of product warranty from date of retail sale	5 years
Warranty activity
Accrued warranty, beginning of year	1,588,000	1,636,000	1,377,000
Warranty expense	1,361,626	1,757,367	2,405,774
Warranty claims paid	(1,340,626)	(1,805,367)	(2,146,774)
Accrued warranty, end of year	$ 1,609,000	$ 1,588,000	$ 1,636,000
Stock options
Weighted-average assumptions utilized to determine stock compensation expense relating to stock options
Risk free interest rate (as a percent)			1.90%
Expected life			7 years
Expected volatility (as a percent)			48.82%