Note 18 - Reconciliations of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 27, 2016	Mar. 29, 2015	Mar. 30, 2014
Income tax benefit at statutory rate	$ (5,849)	$ (15,441)	$ (937)
State income taxes, net of federal tax benefit	(218)	(64)	(1)
Deferred tax assets not benefited	(2,975)	9,052	(1,972)
Tax credits	(901)	(1,182)	(757)
Stock-based compensation	659	435	(427)
Foreign rate differential	9,892	$ (1,927)	156
Prior year tax expense true-up	$ (2)		(10)
Fair value adjustment		$ (1,527)	(3,732)
Investment in US property		8,840	$ 45
OCI tax effect clearance		828
Acquisition cost		2,092	$ 293
Others, net	$ (1,291)	(217)	(1,136)
Income Tax Expense (Benefit)	$ (685)	$ 889	$ (8,478)