Summary of Significant Accounting Policies - Schedule of Weighted Average Shares Outstanding (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Oct. 27, 2017	Oct. 28, 2016	Oct. 27, 2017	Oct. 28, 2016
Accounting Policies [Abstract]
Basic (in shares)	20,188	19,825	20,166	19,807
Dilutive shares (in shares)	33	139	35	175
Diluted (in shares)	20,221	19,964	20,201	19,982