CASH BONUS PLAN: (Narrative) (Details) - USD ($)	3 Months Ended
Jun. 28, 2019	Jun. 29, 2018
Compensation Related Costs [Abstract]
Cash Bonus Plan, contribution	$ 81,000	$ 109,500

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