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FAIR VALUES OF FINANCIAL INSTRUMENTS: (Details Textual)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Carrying amount and estimated fair value of financial instruments    
Gain On Sale Of Securities Net $ 290 $ 55
Valuation allowance for impaired loans   48
Other Real Estate Commercial loan | Level 3    
Carrying amount and estimated fair value of financial instruments    
Fair Value 846 3,500
Other Real Estate Residential Loan | Level 3    
Carrying amount and estimated fair value of financial instruments    
Fair Value 167 142
Impaired Loans | Level 3    
Carrying amount and estimated fair value of financial instruments    
Fair Value 6,581 100
Other Real Estate | Level 3    
Carrying amount and estimated fair value of financial instruments    
Fair Value 1,012 3,625
Assets fair value adjustment increase (decrease) $ 0 $ (64)
Measurement Input, Discount Rate [Member] | Minimum    
Carrying amount and estimated fair value of financial instruments    
Fair Value Inputs, Discount Rate 0  
Measurement Input, Discount Rate [Member] | Minimum | Impaired Loans    
Carrying amount and estimated fair value of financial instruments    
Fair Value Inputs, Discount Rate 0.0000 0.0000
Measurement Input, Discount Rate [Member] | Minimum | Other Real Estate    
Carrying amount and estimated fair value of financial instruments    
Fair Value Inputs, Discount Rate 0.0500 0.0500
Measurement Input, Discount Rate [Member] | Maximum    
Carrying amount and estimated fair value of financial instruments    
Fair Value Inputs, Discount Rate 0.50  
Measurement Input, Discount Rate [Member] | Maximum | Impaired Loans    
Carrying amount and estimated fair value of financial instruments    
Fair Value Inputs, Discount Rate 0.5000 0.5000
Measurement Input, Discount Rate [Member] | Maximum | Other Real Estate    
Carrying amount and estimated fair value of financial instruments    
Fair Value Inputs, Discount Rate 0.2000 0.2000