Organization and Significant Accounting Policies (Details)	3 Months Ended	6 Months Ended
Oct. 26, 2013	Oct. 27, 2012	Oct. 26, 2013 item	Oct. 27, 2012
Segments
Number of reportable segments			2
Denominator for basic earnings (loss) per share:
Weighted average common shares outstanding, excluding unvested restricted stock	22,273,629	22,030,330	22,256,292	21,980,453
Dilutive effect of employee stock options, unvested restricted stock and restricted stock units (in shares)	423,961	353,461		372,981
Denominator for diluted earnings (loss) per share (in shares)	22,697,590	22,383,791	22,256,292	22,353,434
Anti-dilutive stock options, restricted stock units or shares of unvested restricted stock
Number of shares reserved for issuance that met anti-dilutive criterion	29,000	10,000		5,000

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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+ Details