11. Retirement Savings Plan and Executive Severance Policy (Details Narrative) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Plan expenses	$ 304	$ 420

Amount of administration expense of defined benefit plan which decreases plan assets. Excludes plan administration expense paid by employer.

No definition available.

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