Condensed Consolidated Statements of Financial Condition (Unaudited) (Parenthetical) - $ / shares	Dec. 31, 2018	Sep. 30, 2018
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 [Member]
STOCKHOLDERS’ EQUITY
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	30,000,000	15,000,000
Common stock, shares issued (in shares)	9,720,536	9,626,431
Common stock, shares outstanding (in shares)	9,699,591	9,622,595
Common Stock, Nonvoting [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
Treasury stock (in shares)	20,945	3,836