No definition available.

Name:	exar_Note14LeaseFinancingObligationDetailsLineItems
Namespace Prefix:	exar_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The increase during the period in capital lease obligations due to entering into new capital leases.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

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

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585

+ Details

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

- Details

Name:	us-gaap_LeaseArrangementTypeAxis=exar_JanuaryTwoThousandFifteenTwoYearAndTwoThreeYearLicenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BalanceSheetLocationAxis=exar_PropertyPlantAndEquipmentNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseArrangementTypeAxis=exar_OctoberTwoThousandFourteenThreeYearLicenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseArrangementTypeAxis=exar_JulyTwoThousandTwelveThreeYearLicenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_CapitalLeaseObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 14 - Lease Financing Obligation (Details) - USD ($) $ in Thousands	1 Months Ended			6 Months Ended
	Jan. 31, 2015	Oct. 31, 2014	Jul. 31, 2012	Sep. 27, 2015	Sep. 28, 2014
Note 14 - Lease Financing Obligation (Details) [Line Items]
Repayments of Long-term Capital Lease Obligations				$ 919	$ 1,005
January Two Thousand Fifteen Two-Year And Two Three-Year License [Member]
Note 14 - Lease Financing Obligation (Details) [Line Items]
Repayments of Long-term Capital Lease Obligations	$ 1,000
January Two Thousand Fifteen Two-Year And Two Three-Year License [Member] \| Property, Plant and Equipment, Net [Member]
Note 14 - Lease Financing Obligation (Details) [Line Items]
Capital Lease Obligations Incurred	$ 6,900
October 2014 Three-Year License [Member]
Note 14 - Lease Financing Obligation (Details) [Line Items]
Repayments of Long-term Capital Lease Obligations		$ 1,500
October 2014 Three-Year License [Member] \| Property, Plant and Equipment, Net [Member]
Note 14 - Lease Financing Obligation (Details) [Line Items]
Capital Lease Obligations Incurred		$ 4,400
July 2012 Three-Year License [Member] \| Property, Plant and Equipment, Net [Member]
Note 14 - Lease Financing Obligation (Details) [Line Items]
Capital Lease Obligations Incurred			$ 900
Minimum [Member] \| Capital Lease Obligations [Member]
Note 14 - Lease Financing Obligation (Details) [Line Items]
Debt Instrument, Interest Rate, Effective Percentage				2.00%
Maximum [Member] \| Capital Lease Obligations [Member]
Note 14 - Lease Financing Obligation (Details) [Line Items]
Debt Instrument, Interest Rate, Effective Percentage				7.25%