Note 14 - Subsequent Event (Details Textual) $ in Thousands, € in Millions				3 Months Ended		12 Months Ended
		Apr. 04, 2016 EUR (€)	Apr. 04, 2016 USD ($)	Apr. 02, 2016 USD ($)	Mar. 28, 2015 USD ($)	Dec. 31, 2015 USD ($)
Menber's S.p.A. [Member] | Menber's [Member]
Revenue, Net						$ 23,000
Menber's S.p.A. [Member]
Business Combination, Consideration Transferred		€ 16.7	$ 19,000
Revenue, Net	[1]			$ 219,398	$ 210,313

[1] Sales by country represent sale to customer or distributor locations.