Note 3 - Accounting Policies (Details) (USD $)	12 Months Ended
	Mar. 30, 2014	Mar. 31, 2013	Apr. 01, 2012
Note 3 - Accounting Policies (Details) [Line Items]
Number of Reportable Segments	1
Purchase Return Percentage	1.00%
Capitalized Mask Costs	$ 2,300,000	$ 1,700,000
Research and Development Arrangement with Federal Government, Customer Funding to Offset Costs Incurred	1,500,000	2,000,000	4.0
Business Combination, Contingent Consideration, Liability	$ 4,300,000	$ 10,100,000
Machinery and Equipment [Member] | Minimum [Member]
Note 3 - Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Machinery and Equipment [Member] | Maximum [Member]
Note 3 - Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Building [Member]
Note 3 - Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	30 years
Capitalized Mask Costs [Member]
Note 3 - Accounting Policies (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Minimum [Member]
Note 3 - Accounting Policies (Details) [Line Items]
Purchase Return Percentage	5.00%
Maximum [Member]
Note 3 - Accounting Policies (Details) [Line Items]
Purchase Return Percentage	6.00%