Description Of Business	12 Months Ended
Apr. 01, 2012
Description Of Business [Abstract]
Description Of Business	NOTE 1. DESCRIPTION OF BUSINESS Exar Corporation (“Exar” or “We”) was incorporated in California in 1971 and reincorporated in Delaware in 1991. Exar is a fabless semiconductor company that designs, develops and markets high performance analog mixed-signal integrated circuits and advanced sub-system solutions for data and telecommunications, networking and storage, industrial control and consumer applications. Exar’s product portfolio includes power management, connectivity and communications products as well as data and storage products for network security and storage optimization.

The entire disclosure for the nature of an entity's business, the major products or services it sells or provides and its principal markets, including the locations of those markets. If the entity operates in more than one business, the disclosure also indicates the relative importance of its operations in each business and the basis for the determination (for example, assets, revenues, or earnings).

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

-Name Statement of Position (SOP)

-Publisher AICPA

-Number 94-6

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6003-108592

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