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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 RSAs |  |  | Weighted Average Grant-date Fair Value per Share |  |  | Number of RSUs |  |  | Weighted Average Grant-date Fair Value per Unit |
Outstanding at October 1, 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 |  |  |  | — |  |  |  | — |
Granted |  |  | — |  |  |  | — |  |  |  | 8,000 |  |  |  | 14.59 |  |  |  | 161,800 |  |  |  | 15.17 |
Exercised |  |  | (24,500 | ) |  |  | 8.78 |  |  |  | — |  |  |  | — |  |  |  | (500 | ) |  |  | 15.17 |
Forfeited |  |  | — |  |  |  | — |  |  |  | (2,875 | ) |  |  | 14.60 |  |  |  | (24,010 | ) |  |  | 15.17 |
Vested |  |  | — |  |  |  | — |  |  |  | (111,938 | ) |  |  | 16.18 |  |  |  | — |  |  |  | — |
Outstanding at September 30, 2019 |  |  | 165,600 |  |  | $ | 19.15 |  |  |  | 220,412 |  |  | $ | 16.50 |  |  |  | 137,290 |  |  | $ | 15.17 |
Summary of Stock Options Outstanding and Exercisable | The following table summarizes information about stock options outstanding and exercisable at September 30, 2019:
|  | 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 |
$14.87 |  |  | 69,300 |  |  |  | 6.1 |  |  | $ | 14.87 |  |  | $ | 34,650 |  |  |  | — |  |  |  | — |  |  | $ | — |  |  | $ | — |
$21.42 to $21.95 |  |  | 84,300 |  |  |  | 4.5 |  |  |  | 21.63 |  |  |  | — |  |  |  | 33,000 |  |  |  | 0.4 |  |  |  | 21.95 |  |  |  | — |
$26.48 to $26.48 |  |  | 12,000 |  |  |  | 0.9 |  |  |  | 26.48 |  |  |  | — |  |  |  | 12,000 |  |  |  | 0.9 |  |  |  | 26.48 |  |  |  | — |
|  |  | 165,600 |  |  |  | 4.9 |  |  | $ | 19.15 |  |  | $ | 34,650 |  |  |  | 45,000 |  |  |  | 0.5 |  |  | $ | 23.16 |  |  | $ | — |

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