5. Profit Sharing Salary Deferral 401-k Plan (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Details
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 15,854	$ 15,742

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Name:	us-gaap_DefinedBenefitPlanContributionsByEmployer
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration