Revenue Components, Geographic Revenues and Significant Customers (Details Textual)	12 Months Ended
Apr. 01, 2012 Country Segment
Revenue Components Geographic Revenues and Significant Customers (Additional Textual) [Abstract]
Number of operating segments	1
Number of Countries other than the United States and China representing 10% or more of Net Revenues	0
Maximum percentage of net revenues	10.00%

Number of countries other than the United States and China representing 10% or more of net revenues.

No definition available.

Name:	qlgc_NumberOfOtherCountriesRepresentingTenPercentOrMoreOfNetRevenue
Namespace Prefix:	qlgc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration