Note 18 - Segment and Geographic Information (Details) - Net Sales by Geographic Area (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013
Note 18 - Segment and Geographic Information (Details) - Net Sales by Geographic Area [Line Items]
Net sales	$ 43,159	$ 34,018	$ 73,878	$ 66,645
CHINA
Note 18 - Segment and Geographic Information (Details) - Net Sales by Geographic Area [Line Items]
Net sales	16,738	11,341	27,497	22,294
UNITED STATES
Note 18 - Segment and Geographic Information (Details) - Net Sales by Geographic Area [Line Items]
Net sales	5,012	11,572	11,239	22,040
TAIWAN, PROVINCE OF CHINA
Note 18 - Segment and Geographic Information (Details) - Net Sales by Geographic Area [Line Items]
Net sales	5,826	911	7,236	1,793
KOREA, REPUBLIC OF
Note 18 - Segment and Geographic Information (Details) - Net Sales by Geographic Area [Line Items]
Net sales	5,126	544	7,254	1,526
SINGAPORE
Note 18 - Segment and Geographic Information (Details) - Net Sales by Geographic Area [Line Items]
Net sales	3,605	3,534	7,195	6,930
GERMANY
Note 18 - Segment and Geographic Information (Details) - Net Sales by Geographic Area [Line Items]
Net sales	3,055	2,888	6,012	5,668
Rest Of World [Member]
Note 18 - Segment and Geographic Information (Details) - Net Sales by Geographic Area [Line Items]
Net sales	$ 3,797	$ 3,228	$ 7,445	$ 6,394