Consolidated Statements of Stockholders' Equity (USD $)	Common Stock [Member] Altior [Member]	Common Stock [Member] Cadeka Microcircuits [Member]	Common Stock [Member] USD ($)	Treasury Stock [Member] USD ($)	Additional Paid-in Capital [Member] Altior [Member] USD ($)	Additional Paid-in Capital [Member] Cadeka Microcircuits [Member] USD ($)	Additional Paid-in Capital [Member] Integrated Memory Logic Limited [Member] USD ($)	Additional Paid-in Capital [Member] USD ($)	Retained Earnings [Member] USD ($)	AOCI Attributable to Parent [Member] USD ($)	Parent [Member] Altior [Member] USD ($)	Parent [Member] Cadeka Microcircuits [Member] USD ($)	Parent [Member] Integrated Memory Logic Limited [Member] USD ($)	Parent [Member] USD ($)	Noncontrolling Interest [Member] Integrated Memory Logic Limited [Member] USD ($)	Noncontrolling Interest [Member] USD ($)	Altior [Member] USD ($)	Cadeka Microcircuits [Member] USD ($)	Integrated Memory Logic Limited [Member] USD ($)	Total USD ($)
Balance at Apr. 01, 2012			$ 5,000	$ (248,983,000)				$ 734,821,000	$ (262,350,000)	$ (201,000)				$ 223,292,000						$ 223,292,000
Balance (in Shares) at Apr. 01, 2012			65,169,602	(19,924,369)
Net income (loss)									2,882,000					2,882,000						2,882,000
Change in unrealized gains on marketable securities										(325,000)				(325,000)						(325,000)
Shares issued through employee stock plans								6,296,000						6,296,000						6,296,000
Shares issued through employee stock plans (in Shares)			903,772																	26,000
Shares issued in connection acquisition					3,740,000						3,740,000						3,740,000
Shares issued in connection acquisition (in Shares)	357,873
Shares issued for vested restricted stock units (in Shares)			125,095
Withholding of shares for tax obligations on vested restricted stock units								(219,000)						(219,000)						(219,000)
Withholding of shares for tax obligations on vested restricted stock units (in Shares)			(24,727)
Repurchase of common stock																				0
Stock-based compensation								4,788,000						4,788,000						4,788,000
Balance at Mar. 31, 2013			5,000	(248,983,000)				749,426,000	(259,468,000)	(526,000)				240,454,000						240,454,000
Balance (in Shares) at Mar. 31, 2013			66,531,615	(19,924,369)
Net income (loss)									5,801,000					5,801,000						5,801,000
Change in unrealized gains on marketable securities										(553,000)				(553,000)						(553,000)
Shares issued through employee stock plans								5,833,000						5,833,000						5,833,000
Shares issued through employee stock plans (in Shares)			805,527																	20,000
Shares issued in connection acquisition						5,005,000						5,005,000						5,005,000
Shares issued in connection acquisition (in Shares)		438,995
Shares issued for vested restricted stock units								12,000						12,000						12,000
Shares issued for vested restricted stock units (in Shares)			346,407
Withholding of shares for tax obligations on vested restricted stock units								(1,149,000)						(1,149,000)						(1,149,000)
Withholding of shares for tax obligations on vested restricted stock units (in Shares)			(106,865)
Retirement of treasury shares				248,983,000				(248,983,000)
Retirement of treasury shares (in Shares)			(19,924,369)	19,924,369
Repurchase of common stock								(9,000,000)						(9,000,000)						(9,000,000)
Repurchase of common stock (in Shares)			(755,305)
Stock-based compensation								6,972,000						6,972,000						6,972,000
Balance at Mar. 30, 2014			5,000					508,116,000	(253,667,000)	(1,079,000)				253,375,000						253,375,000
Balance (in Shares) at Mar. 30, 2014			47,336,005
Net income (loss)									(44,970,000)					(44,970,000)						(44,970,000)
Change in unrealized gains on marketable securities										1,053,000				1,053,000						1,053,000
Shares issued through employee stock plans								6,358,000						6,358,000						6,358,000
Shares issued through employee stock plans (in Shares)			890,709																	26,000
Option assumed from acquisition of Integrated Memory Logic Limited							3,835,000						3,835,000						3,835,000
Non-controlling interest upon acquisition of 92% of iML shares and additional contributions							(307,000)						(307,000)		18,920,000				18,613,000
Purchase of iML non-controlling interests ownership															(18,883,000)				(18,883,000)
Net loss attributable to non-controlling interests																(37,000)				(37,000)
Shares issued for vested restricted stock units								416,000						416,000						416,000
Shares issued for vested restricted stock units (in Shares)			414,242
Withholding of shares for tax obligations on vested restricted stock units								(1,090,000)						(1,090,000)						(1,090,000)
Withholding of shares for tax obligations on vested restricted stock units (in Shares)			(104,376)
Retirement of treasury shares			8,000,000
Repurchase of common stock								(7,999,000)						(7,999,000)						(7,999,000)
Repurchase of common stock (in Shares)			(790,962)
Stock-based compensation								12,161,000						12,161,000						12,161,000
Balance at Mar. 29, 2015			$ 5,000					$ 521,490,000	$ (298,637,000)	$ (26,000)				$ 222,832,000						$ 222,832,000
Balance (in Shares) at Mar. 29, 2015			47,745,618