Restructuring - Narrative (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2018 USD ($)	Jul. 01, 2018 USD ($)	Apr. 01, 2018 USD ($) employee	Apr. 02, 2017 USD ($)
GigPeak Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Lease obligation changes			$ 2,800
Accrued liabilities		$ 2,200
Other Long Term Liabilities | GigPeak Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Accrued liabilities		1,500
Other Accrued Liabilities | GigPeak Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Accrued liabilities		700
Cost of revenues | Other Restructuring Plan - 2018 Restructuring
Restructuring Cost and Reserve [Line Items]
Asset impairment charges			5,400
Operating Expense | Other Restructuring Plan - 2018 Restructuring
Restructuring Cost and Reserve [Line Items]
Asset impairment charges			2,400
Employee severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges		533
Payments for restructuring actions		3,115
Accrued balance for employee severance costs		2,055	$ 4,637
Employee severance | GigPeak Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Number of reduced headcount (employees) | employee			46
Restructuring charges			$ 2,700
Payments for restructuring actions		400		$ 2,100
Employee severance | Other Restructuring Plan - 2018 Restructuring
Restructuring Cost and Reserve [Line Items]
Number of reduced headcount (employees) | employee			63
Restructuring charges		500	$ 5,100
Payments for restructuring actions		2,200	2,300
Accrued balance for employee severance costs		1,100
Asset impairment charges			7,800
Employee severance | Workforce-Reduction Plan
Restructuring Cost and Reserve [Line Items]
Payments for restructuring actions		500
Accrued balance for employee severance costs		300	800
Employee severance | Other Restructuring Plan, 2015 Restructuring | High-Speed Converter Business
Restructuring Cost and Reserve [Line Items]
Accrued balance for employee severance costs		$ 600	$ 600
Employee severance | Scenario, Forecast | GigPeak Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Payments for restructuring actions	$ 200