Note 3 - Fair Value and Marketable Securities (Details) - Summary of Available-for-Sale Securities (USD $) In Thousands, unless otherwise specified	Sep. 27, 2014		Dec. 31, 2013
Note 3 - Fair Value and Marketable Securities (Details) - Summary of Available-for-Sale Securities [Line Items]
Former-auction corporate debt security (2)			$ 2,997	[1]
Auction Rate Security - Preferred Equity			450
Total			3,447
Fair Value, Inputs, Level 1 [Member]
Note 3 - Fair Value and Marketable Securities (Details) - Summary of Available-for-Sale Securities [Line Items]
Former-auction corporate debt security (2)				[1]
Fair Value, Inputs, Level 2 [Member]
Note 3 - Fair Value and Marketable Securities (Details) - Summary of Available-for-Sale Securities [Line Items]
Former-auction corporate debt security (2)			2,997	[1]
Total			2,997
Fair Value, Inputs, Level 3 [Member]
Note 3 - Fair Value and Marketable Securities (Details) - Summary of Available-for-Sale Securities [Line Items]
Former-auction corporate debt security (2)				[1]
Auction Rate Security - Preferred Equity			450
Total			450
Amortized Cost Basis [Member]
Note 3 - Fair Value and Marketable Securities (Details) - Summary of Available-for-Sale Securities [Line Items]
Former-auction corporate debt security (2)			1,800	[1],[2]
Auction Rate Security - Preferred Equity				[2]
Total		[2]	$ 1,800	[2]

[1] Available for sale debt security with a contractual maturity in excess of 10 years.

[2] Difference between amortized cost basis and fair value represents gross unrealized gains.