No authoritative reference available.

No definition available.

Name:	exar_CapitalizedMaskCosts
Namespace Prefix:	exar_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

No authoritative reference available.

+ References

No definition available.

+ Details

Name:	exar_PurchaseReturnPercentage
Namespace Prefix:	exar_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

No authoritative reference available.

+ References

No definition available.

+ Details

Name:	exar_ScrapAllowancePercentage
Namespace Prefix:	exar_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of customer funding recorded as an offset to costs incurred for a fixed-price, best-efforts research and development cost-sharing arrangement with the Federal Government.

+ References

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

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-FGC

-Paragraph 57

-Subparagraph b

-IssueDate 2006-05-01

-Chapter 3

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_ResearchAndDevelopmentArrangementWithFederalGovernmentCustomerFundingToOffsetCostsIncurred
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Note 3. Accounting Policies (Detail) (USD $)	12 Months Ended
Note 3. Accounting Policies (Detail) (USD $)	Mar. 31, 2013	Apr. 01, 2012	Mar. 27, 2011
Number of Reportable Segments	1
Scrap Allowance Percentage	1.00%
Capitalized Mask Costs (in Dollars)	$ 1,700,000	$ 0
Research and Development Arrangement with Federal Government, Customer Funding to Offset Costs Incurred (in Dollars)	$ 2,000,000	$ 4,000,000	$ 5,000,000
Machinery and Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Machinery and Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	10 years
Building [Member]
Property, Plant and Equipment, Useful Life	30 years
Capitalized Mask Costs [Member]
Finite-Lived Intangible Asset, Useful Life	5 years
Minimum [Member]
Purchase Return Percentage	3.00%
Maximum [Member]
Purchase Return Percentage	6.00%