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CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - $ / shares
Sep. 30, 2017
Sep. 30, 2016
STOCKHOLDERS’ EQUITY    
Preferred stock, shares authorized (in shares) 3,000,000 3,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 15,000,000 15,000,000
Common stock, shares issued (in shares) 9,626,431 8,523,641
Common stock, shares outstanding (in shares) 9,622,595 8,523,641
Treasury stock (in shares) 3,836 0
Nonvoting Common Stock [Member]    
STOCKHOLDERS’ EQUITY    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 3,000,000 3,000,000
Common stock, shares issued (in shares) 0 0
Common stock, shares outstanding (in shares) 0 0