Receivables: (Tables)

12 Months Ended

Dec. 29, 2012

Receivables:

Schedule of the Company's current receivables

	December 29, 2012		December 31, 2011
Trade	$	20,800	$	55,100
Royalty	1,074,600		989,300
Notes receivable	—		3,500
Other	141,700		268,300
	$	1,237,100	$	1,316,200

Schedule of activity in the allowance for doubtful accounts for trade and notes receivables

	December 29, 2012			December 31, 2011
Balance at beginning of year	$	15,100		$	17,400
Provisions charged to expense	2,900			(2,200		)
Deductions for amounts written-off	(700		)	(100		)
Balance at end of year	$	17,300		$	15,100