Note 6 - Stock-Based Compensation (Detail) (USD $)	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
Nov. 25, 2012	Nov. 27, 2011	Nov. 25, 2012	Nov. 27, 2011	Nov. 27, 2011	Nov. 25, 2012 Restricted Stock Units (RSUs) [Member]	Nov. 27, 2011 Restricted Stock Units (RSUs) [Member]	Nov. 25, 2012 Restricted Stock Units (RSUs) [Member]	Nov. 27, 2011 Restricted Stock Units (RSUs) [Member]	Nov. 25, 2012 Stock Options [Member]	Nov. 27, 2011 Stock Options [Member]	Nov. 27, 2012 Stock Options [Member]	Nov. 27, 2011 Stock Options [Member]
Share-based Compensation	$ 323,000	$ 444,000	$ 671,000	$ 885,000	$ 885,000	$ 141,000	$ 193,000	$ 298,000	$ 395,000	$ 182,000	$ 251,000	$ 373,000	$ 490,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 1,200,000		$ 1,200,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition						1 year 146 days				1 year 219 days

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration