Organization and Significant Accounting Policies Other (Details) - shares	3 Months Ended		6 Months Ended
	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Denominator for basic (loss) earnings per share:
Weighted average common shares outstanding, excluding unvested restricted stock (in shares)	23,049,056	22,985,956	23,002,832	22,966,513
Dilutive effect of employee stock options and unvested restricted stock (in shares)	0	162,500	0	0
Denominator for diluted (loss) earnings per share (in shares)	23,049,056	23,148,456	23,002,832	22,966,513
Number of shares reserved for issuance that are anti-dilutive	199,428	21,000	256,366	208,102