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Stockholders' Equity (Tables) | 12 Months Ended
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Sep. 30, 2018
Stockholders Equity Note [Abstract] |
Summary of Combined Activity Under Equity Incentive Plans | The following table summarizes the combined activity under the equity incentive plans for the indicated periods:
|  | Number of Nonqualified Options Outstanding |  |  | Weighted Average Exercise Price per Share |  |  | Number of Restricted Stock Awards |  |  | Weighted Average Grant-date Fair Value per Share |
Outstanding at October 1, 2015 |  |  | 89,700 |  |  | $ | 17.27 |  |  |  | 142,500 |  |  | $ | 93.80 |
Granted |  |  | 69,300 |  |  |  | 14.87 |  |  |  | 182,400 |  |  |  | 14.84 |
Exercised |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Forfeited |  |  | — |  |  |  | — |  |  |  | (2,250 | ) |  |  | 77.33 |
Vested |  |  | — |  |  |  | — |  |  |  | (49,000 | ) |  |  | 90.73 |
Outstanding at September 30, 2016 |  |  | 159,000 |  |  |  | 16.23 |  |  |  | 273,650 |  |  |  | 39.98 |
Granted |  |  | 51,300 |  |  |  | 21.42 |  |  |  | 109,500 |  |  |  | 21.12 |
Exercised |  |  | (4,000 | ) |  |  | 8.78 |  |  |  | — |  |  |  | — |
Forfeited |  |  | (4,500 | ) |  |  | 26.48 |  |  |  | (3,250 | ) |  |  | 28.73 |
Vested |  |  | — |  |  |  | — |  |  |  | (91,100 | ) |  |  | 22.02 |
Outstanding at September 30, 2017 |  |  | 201,800 |  |  |  | 17.47 |  |  |  | 288,800 |  |  |  | 28.92 |
Granted |  |  | — |  |  |  | — |  |  |  | 176,450 |  |  |  | 15.13 |
Exercised |  |  | (7,700 | ) |  |  | 8.78 |  |  |  | — |  |  |  | — |
Forfeited |  |  | (4,000 | ) |  |  | 17.63 |  |  |  | (21,925 | ) |  |  | 18.75 |
Vested |  |  | — |  |  |  | — |  |  |  | (116,100 | ) |  |  | 45.19 |
Outstanding at September 30, 2018 |  |  | 190,100 |  |  | $ | 17.81 |  |  |  | 327,225 |  |  | $ | 16.42 |
Summary of Stock Options Outstanding and Exercisable | The following table summarizes information about stock options outstanding and exercisable at September 30, 2018:
|  | Options Outstanding |  |  | Options Exercisable |
Range of Exercise Prices |  | Shares |  |  | Weighted Average Remaining Term (in years) |  |  | Weighted Average Exercise Price |  |  | Intrinsic Value |  |  | Shares |  |  | Weighted Average Remaining Term (in years) |  |  | Weighted Average Exercise Price |  |  | Intrinsic Value |
$8.78 |  |  | 24,500 |  |  |  | 0.2 |  |  | $ | 8.78 |  |  | $ | 120,540 |  |  |  | 24,500 |  |  |  | 0.2 |  |  | $ | 8.78 |  |  | $ | 120,540 |
$14.87 |  |  | 69,300 |  |  |  | 7.1 |  |  |  | 14.87 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
$21.42 to $26.48 |  |  | 96,300 |  |  |  | 5.1 |  |  |  | 22.32 |  |  |  | — |  |  |  | — |  |  |  | 2.5 |  |  |  | 23.30 |  |  |  | — |
|  |  | 190,100 |  |  |  | 5.2 |  |  | $ | 17.81 |  |  | $ | 120,540 |  |  |  | 24,500 |  |  |  | 4.1 |  |  | $ | 17.18 |  |  | $ | 120,540 |

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