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FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK (Tables)
9 Months Ended
Jun. 30, 2020
FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK [Abstract]  
Schedule of fair value, off-balance sheet financial instruments
   June 30,   September 30, 
   2020   2019 
   (In thousands) 
Financial instruments whose contract amounts          
represent credit risk          
Letters of credit  $1,042   $1,315 
Unused lines of credit   57,254    56,405 
Fixed rate loan commitments   22,296    3,362 
Variable rate loan commitments   117    12,141 
 Total  $80,709   $73,223