2011 EQUITY INCENTIVE PLAN (Schedule of Stock-Based Compensation Expense) (Details) - USD ($) $ in Thousands		3 Months Ended
		Jun. 30, 2018	Jun. 29, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock option expense	[1]		$ 3	$ 20
IEH employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock option expense
Non-employee directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock option expense		$ 20	$ 3

[1] The Company reported compensation expense of $2,798 during the quarter ended June 29, 2018 and $19,586 during the quarter ended June 30, 2017 resulting from stock options granted on August 15, 2016.