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Consolidated Balance Sheets (Parenthetical) - $ / shares
Mar. 31, 2021
Sep. 30, 2020
Statement Of Financial Position [Abstract]    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 20,185,000 20,077,000
Common stock, shares outstanding 20,185,000 20,077,000