Note 18 - Segment and Geographic Information (Tables)

6 Months Ended

Sep. 27, 2015

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Three Months Ended				Six Months Ended
	September 27, 2015		September 28, 2014		September 27, 2015		September 28, 2014
Industrial	$	15,425	$	19,656	$	36,000	$	38,523
High-End Consumer		13,163		16,199		26,699		19,623
Infrastructure		6,154		7,304		12,465		15,732
Total net sales	$	34,742	$	43,159	$	75,164	$	73,878

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

	Three Months Ended				Six Months Ended
	September 27, 2015		September 28, 2014		September 27, 2015		September 28, 2014
China	$	17,898	$	16,738	$	32,822	$	27,497
Taiwan		3,881		5,826		8,968		7,236
United States		1,782		5,012		8,397		11,239
Singapore		3,300		3,605		7,485		7,195
Germany		3,286		3,055		6,959		6,012
Korea		1,872		5,126		4,840		7,254
Rest of world		2,723		3,797		5,693		7,445
Total net sales	$	34,742	$	43,159	$	75,164	$	73,878

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

	Three Months Ended				Six Months Ended
	September 27, 2015		September 28, 2014		September 27, 2015		September 28, 2014
Distributor A +		25%		20%		27%		24%
Customer D		15%		*		11%		*
Distributor F		*		11%		*		*

Schedule Of Major Distributors [Table Text Block]

	September 27, 2015			March 29, 2015
Customer D		19	%		10	%
Distributor A +		17	%		6	%
Distributor E		11	%		12	%
Distributor B		*			11	%
Distributor D		*			10	%