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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions | Sep. 30, 2018 | Sep. 30, 2017
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CONSOLIDATED BALANCE SHEETS |  |
Accounts receivable, allowance for doubtful accounts (in dollars) | $ 0.9 | $ 0.8
Preferred stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Preferred stock, shares authorized | 1,000,000 | 1,000,000
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common stock, shares authorized | 3,000,000 | 3,000,000
Common stock, shares outstanding | 615,777 | 678,006

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