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PRINCIPLES OF CONSOLIDATION (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
May 31, 2021
Oct. 31, 2020
Dec. 31, 2019
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Mar. 31, 2021
Nov. 30, 2019
PRINCIPLES OF CONSOLIDATION                  
Number of shares additional issued 500 500              
Additional Shares exercised 500 500              
Trust Company                  
PRINCIPLES OF CONSOLIDATION                  
Number of shares issued     1,500            
Number of stock options exercised     1,500            
Non controlling Interest       $ 199,000   $ 199,000   $ 154,000  
Net income attributable to the noncontrolling interest       $ 5,000 $ 2,000 $ 7,000 $ 5,000    
Trust Company | Riverview Community Bank                  
PRINCIPLES OF CONSOLIDATION                  
Ownership percentage       97.30%   97.30%     100.00%
Trust Company | Riverview Trust Company's President And Chief Executive Officer                  
PRINCIPLES OF CONSOLIDATION                  
Noncontrolling interest percentage       2.70%   2.70%