Note 3 - Income Per Share (Detail) - Table of Earnings Per Share Reconciliation (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Mar. 31, 2013		Dec. 23, 2012		Sep. 23, 2012		Jun. 24, 2012		Mar. 25, 2012		Dec. 25, 2011		Sep. 25, 2011		Jun. 26, 2011		Mar. 31, 2013	Mar. 25, 2012	Mar. 27, 2011
Basic EPS
Basic calculation (in Dollars)																	$ 7,468	$ 6,158	$ 2,213
Basic calculation	4,411,000	[1]	4,414,000	[1]	4,407,000	[1]	4,368,000	[1]	4,559,000	[1]	4,964,000	[1]	5,025,000	[1]	5,078,000	[1]	4,400,000	4,906,000	5,403,000
Basic calculation (in Dollars per share)	$ 0.35	[1]	$ 0.24	[1]	$ 0.65	[1]	$ 0.46	[1]	$ 0.24	[1]	$ 0.24	[1]	$ 0.45	[1]	$ 0.31	[1]	$ 1.70	$ 1.26	$ 0.41
Effect of dilutive employee stock options (in Dollars)																	0	0	0
Effect of dilutive employee stock options																	188,000	143,000	101,000
Effect of dilutive employee stock options (in Dollars per share)																	$ (0.07)	$ (0.04)	$ (0.01)
Diluted EPS
Diluted calculation (in Dollars)																	$ 7,468	$ 6,158	$ 2,213
Diluted calculation	4,603,000	[1]	4,612,000	[1]	4,604,000	[1]	4,531,000	[1]	4,720,000	[1]	5,113,000	[1]	5,163,000	[1]	5,201,000	[1]	4,588,000	5,049,000	5,504,000
Diluted calculation (in Dollars per share)	$ 0.34	[1]	$ 0.23	[1]	$ 0.62	[1]	$ 0.44	[1]	$ 0.23	[1]	$ 0.24	[1]	$ 0.44	[1]	$ 0.31	[1]	$ 1.63	$ 1.22	$ 0.40

[1] The sum of the quarters may not equal the full year per share amounts included in the accompanying consolidated statements of earnings due to the effect of the weighted average number of shares outstanding during the fiscal years as compared to the quarters.