Note 10 - Income Taxes (Detail) - Tabular reconciliation of the total amounts of unrecognized tax benefits (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 25, 2012
Unrecognized tax benefits, beginning of year	$ 422	$ 318
Increases based on tax positions taken in prior years	0	119
Decreases of tax positions taken in prior years	(50)	(41)
Increase based on tax positions taken in current year	34	26
Settlements of tax positions taken in prior years	(110)	0
Unrecognized tax benefits, end of year	$ 296	$ 422