3. INVESTMENT SECURITIES (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Details
Available for Sale Securities, Basis for Valuation	Investment securities available for sale are carried at estimated fair market value.
Proceeds from Sale of Securities, Operating Activities	$ 14,873,211	$ 12,621,828
Proceeds from redemptions of investment securities due to the exercise of call provisions by the issuers thereof	9,545,000	9,505,000
Gross Gains realized from Proceeds from redemptions of investment securities due to the exercise of call provisions by the issuers thereof	$ 38,130	13,932
Net Gains realized from Proceeds from redemptions of investment securities due to the exercise of call provisions by the issuers thereof		$ 13,932

Represents the description of Available for Sale Securities, Basis for Valuation, during the indicated time period.

No definition available.

Name:	fil_AvailableForSaleSecuritiesBasisForValuation
Namespace Prefix:	fil_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the monetary amount of Gross Gains realized from Proceeds from redemptions of investment securities due to the exercise of call provisions by the issuers thereof, during the indicated time period.

+ References

No definition available.

+ Details

Name:	fil_GrossGainsRealizedFromProceedsFromRedemptionsOfInvestmentSecuritiesDueToTheExerciseOfCallProvisionsByTheIssuersThereof
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the monetary amount of Net Gains realized from Proceeds from redemptions of investment securities due to the exercise of call provisions by the issuers thereof, during the indicated time period.

+ References

No definition available.

+ Details

Name:	fil_NetGainsRealizedFromProceedsFromRedemptionsOfInvestmentSecuritiesDueToTheExerciseOfCallProvisionsByTheIssuersThereof
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the monetary amount of Proceeds from redemptions of investment securities due to the exercise of call provisions by the issuers thereof, during the indicated time period.

+ References

No definition available.

+ Details

Name:	fil_ProceedsFromRedemptionsOfInvestmentSecuritiesDueToTheExerciseOfCallProvisionsByTheIssuersThereof
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Cash received from sale of investments in debt and equity securities, classified as operating activities, during the period; includes trading securities and any other investments classified as operating.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585

+ Details

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

- References

No definition available.

+ Details

Name:	us-gaap_TextBlockAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration