Note 3 - Fair Value and Marketable Securities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 29, 2013 Other Income [Member] Preferred Equity Securities [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 28, 2014 Other Income [Member]	Jun. 29, 2013 Preferred Equity Securities [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 28, 2014 Preferred Equity Securities [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 28, 2014 Corporate Debt Securities [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2013 Minimum [Member]
Note 3 - Fair Value and Marketable Securities (Details) [Line Items]
Available-for-Sale Debt Securities, Contractual Maturities						10 years
Proceeds from Sale of Available-for-sale Securities, Debt					$ 2,960
Proceeds from Sale of Available-for-sale Securities, Equity			2,000	568
Gain (Loss) on Sale of Equity Investments	$ 872	$ 1,728