Note 5 - Fair Value (Details) - Summary of the Gross Unrealized Losses and Fair Values of Investments (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014
Note 5 - Fair Value (Details) - Summary of the Gross Unrealized Losses and Fair Values of Investments [Line Items]
Fair Value Less than 12 Months	$ 93,424
Gross Unrealized Losses Less than 12 Months	(258)
Fair Value Greater than 12 Months	7,057
Gross Unrealized Losses Greater than 12 Months	(55)
Fair Value Total	100,481
Gross Unrealized Losses Total	(313)	[1]
US Government Agencies Debt Securities [Member]
Note 5 - Fair Value (Details) - Summary of the Gross Unrealized Losses and Fair Values of Investments [Line Items]
Fair Value Less than 12 Months	18,245
Gross Unrealized Losses Less than 12 Months	(39)
Fair Value Total	18,245
Gross Unrealized Losses Total	(39)	[1]
Corporate Debt Securities [Member]
Note 5 - Fair Value (Details) - Summary of the Gross Unrealized Losses and Fair Values of Investments [Line Items]
Fair Value Less than 12 Months	48,379
Gross Unrealized Losses Less than 12 Months	(87)
Fair Value Greater than 12 Months	596
Gross Unrealized Losses Greater than 12 Months	(1)
Fair Value Total	48,975
Gross Unrealized Losses Total	(88)	[1]
Asset-backed Securities [Member]
Note 5 - Fair Value (Details) - Summary of the Gross Unrealized Losses and Fair Values of Investments [Line Items]
Fair Value Less than 12 Months	7,118
Gross Unrealized Losses Less than 12 Months	(12)
Fair Value Greater than 12 Months	5,478
Gross Unrealized Losses Greater than 12 Months	(36)
Fair Value Total	12,596
Gross Unrealized Losses Total	(48)	[1]
Collateralized Mortgage Backed Securities [Member]
Note 5 - Fair Value (Details) - Summary of the Gross Unrealized Losses and Fair Values of Investments [Line Items]
Fair Value Less than 12 Months	19,682
Gross Unrealized Losses Less than 12 Months	(120)
Fair Value Greater than 12 Months	983
Gross Unrealized Losses Greater than 12 Months	(18)
Fair Value Total	20,665
Gross Unrealized Losses Total	$ (138)	[1]

[1] Gross of tax impact of $828