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Commitments and Contingencies - Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2016	May 02, 2015	Apr. 26, 2014
Operating Leased Assets
Operating leases, rent expense	$ 2,725	$ 2,714	$ 2,742
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity
2014	2,166
2015	1,715
2016	1,233
2017	1,040
2018	852
Thereafter	779
Total	7,785
January 1, 2015 to December 31, 2016
Operating Leased Assets
Operating leases, purchase option price	9,000
Year ending December 2017
Operating Leased Assets
Operating leases, purchase option price	9,090
Year ending December 2018
Operating Leased Assets
Operating leases, purchase option price	$ 9,180

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 55
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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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