Note 18 - Segment and Geographic Information (Details) - Net Sales by End Market - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Segment Reporting Information [Line Items]
Net sales by end market	$ 34,742	$ 43,159	$ 75,164	$ 73,878
Industrial [Member]
Segment Reporting Information [Line Items]
Net sales by end market	15,425	19,656	36,000	38,523
High End Consumer [Member]
Segment Reporting Information [Line Items]
Net sales by end market	13,163	16,199	26,699	19,623
Infrastructure [Member]
Segment Reporting Information [Line Items]
Net sales by end market	$ 6,154	$ 7,304	$ 12,465	$ 15,732