Organization and Significant Accounting Policies Other (Details) - shares	3 Months Ended
	Jul. 29, 2017	Jul. 30, 2016
Denominator for basic earnings per share:
Weighted average common shares (in shares)	23,336,305	22,956,607
Dilutive effect of employee stock options, restricted stock and restricted stock units (in shares)	0	0
Denominator for diluted earnings per share (in shares)	23,336,305	22,956,607
Number of shares reserved for issuance that are anti-dilutive	256,011	302,332