CASH BONUS PLAN: (Narrative) (Details) - USD ($)	12 Months Ended
Mar. 30, 2018	Mar. 31, 2017
Compensation Related Costs [Abstract]
Cash Bonus Plan, contribution tier 1	1.50%
Cash Bonus Plan, contribution	$ 324,000	$ 324,000

Amount of contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement.

No definition available.

Name:	us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration