Note 3 - Acquisition of Businesses (Details) (USD $)	9 Months Ended		1 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended	1 Months Ended	3 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	May 31, 2013 Hamlin, Inc. [Member]	Sep. 28, 2013 Hamlin, Inc. [Member]	Sep. 28, 2013 Hamlin, Inc. [Member]	Mar. 30, 2013 Accel AB [Member] Trademarks [Member]	Mar. 30, 2013 Accel AB [Member] Licensing Agreements [Member]	May 31, 2012 Accel AB [Member]	Sep. 29, 2012 Accel AB [Member]	Sep. 26, 2012 Terra Power [Member]	Mar. 30, 2013 Minimum [Member] Accel AB [Member] Distribution Rights [Member]	Mar. 30, 2013 Maximum [Member] Accel AB [Member] Distribution Rights [Member]
Note 3 - Acquisition of Businesses (Details) [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired			100.00%					100.00%		100.00%
Payments to Acquire Businesses, Net of Cash Acquired	$ 145,000,000	$ 34,016,000	$ 145,000,000
Finite-Lived Intangible Asset, Useful Life			10 years			5 years	10 years				3 years	10 years
Business Acquisition, Inventory Step-up			2,100,000					400,000
Non-cash Charges Related to Inventory Step-up				400,000					400,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual				21,100,000	28,100,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual				300,000	600,000
Payments to Acquire Businesses, Gross								$ 23,900,000		$ 10,600,000