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Deferred Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Deferred Revenue Disclosure [Abstract]    
Deferred Revenue, Period Start $ 10,514 $ 15,397
Deferred Revenue, Noncurrent 220 800
Revenue deferred 19,726 15,470
Revenue recognized (20,994) (15,251)
Deferred Revenue, Period Start $ 9,246 $ 15,616