INVESTMENTS IN SECURITIES (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014	Dec. 28, 2014
Schedule of Available-for-sale Securities [Line Items]
Realized gain on sale of securities	$ 67,200	$ 56,100	$ 197,100	$ 257,600
Realized loss on sale of securities	11,700	$ 0	20,000	$ 0
Fixed income securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed income securities, Amortized Cost	102,079,000		102,079,000		$ 204,286,000
Fixed income securities, Fair Value	102,079,000		102,079,000		204,286,000
Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed income securities, Amortized Cost	499,000		499,000		80,000
Fixed income securities, Fair Value	$ 499,000		$ 499,000		$ 80,000