Note 8 - Summary of Net Sales to Customers, Attributed to Countries (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Malaysia [Member]
Net sales	$ 60,776	$ 73,818	$ 51,491
CHINA
Net sales	52,589	51,662	39,202
UNITED STATES
Net sales	50,704	72,266	39,504
PHILIPPINES
Net sales	16,270	28,669	26,489
Rest of the World [Member]
Net sales	89,315	90,214	57,825
Net sales	$ 269,654	$ 316,629	$ 214,511