Summary of Significant Accounting Policies and Concentrations of Risk (Concentrations) (Details)	12 Months Ended
Mar. 28, 2015 Customer	Mar. 29, 2014 Customer	Mar. 30, 2013 Customer
Concentration Risk [Line Items]
Percentage of total accounts receivable accounted from Avnet	67.00%	55.00%
Percentage of net revenues through resale of product from Avnet	43.00%	46.00%	46.00%
Number of end customers accounted for net revenues	0	0	0
Percentage of mortgage-backed securities in total investment portfolio	31.00%
Minimum [Member]
Concentration Risk [Line Items]
Percentage of higher grade securities investment in debt securities (more than)	90.00%
Sales Revenue, Goods, Net [Member] \| Support Products [Member] \| Maximum [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	5.00%	5.00%	5.00%

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592

+ Details

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- Definition

Number of end customers accounted for more than 10% of net revenues.

+ References

No definition available.

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- Definition

Percentage of accounts receivable accounted from distributor.

+ References

No definition available.

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- Definition

Percentage of higher grade securities investment in debt securities.

+ References

No definition available.

+ Details

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- Definition

Percentage of mortgage backed securities in investment portfolio.

+ References

No definition available.

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- Definition

Net revenue threshold for significant customer.

+ References

No definition available.

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