Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 25, 2017
Income Tax Contingency [Line Items]
Income tax (benefit) expense	$ (171)	$ 794	$ (71)	$ 1,117
Release of valuation allowance	1,100
Infinia Technology Corporation (ITC)
Income Tax Contingency [Line Items]
Long-term deferred tax liability					$ 1,100
Infinia Technology Corporation (ITC)
Income Tax Contingency [Line Items]
Acquired losses	$ 300		$ 300