Note 9 - Short-term Debt (Details) - Interest on Short-term Debt - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 28, 2014	Sep. 28, 2014
Note 9 - Short-term Debt (Details) - Interest on Short-term Debt [Line Items]
Interest on short-term debt	$ 455	$ 902
CTBC [Member]
Note 9 - Short-term Debt (Details) - Interest on Short-term Debt [Line Items]
Interest on short-term debt	211	256
Stifel Financial Corp. [Member]
Note 9 - Short-term Debt (Details) - Interest on Short-term Debt [Line Items]
Interest on short-term debt	$ 244	$ 646