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Stock-Based Compensation (Tables) | 12 Months Ended
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Sep. 30, 2019
Share Based Compensation [Abstract] |
Summary of Stock Option Activity | The following table summarizes stock option activity for the years ended September 30, 2019 and 2018:
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life |  |  | Intrinsic Value |
Outstanding at September 30, 2017 |  |  | 211,668 |  |  | $ | 13.19 |  |  |  | 3.47 |  |  | $ | 454,117 |
Granted |  |  | 20,000 |  |  |  | 32.24 |  |  |  | 9.02 |  |  |  |  |
Outstanding at September 30, 2018 |  |  | 231,668 |  |  | $ | 14.84 |  |  |  | 3.04 |  |  | $ | 162,500 |
Exercisable at September 30, 2018 |  |  | 175,000 |  |  | $ | 11.89 |  |  |  | 2.08 |  |  | $ | 162,500 |
Outstanding at September 30, 2018 |  |  | 231,668 |  |  | $ | 14.84 |  |  |  | 3.04 |  |  | $ | 162,500 |
Forfeited |  |  | (31,250 | ) |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at September 30, 2019 |  |  | 200,418 |  |  | $ | 16.05 |  |  |  | 2.40 |  |  | $ | 26,750 |
Exercisable at September 30, 2019 |  |  | 168,084 |  |  | $ | 13.92 |  |  |  | 1.44 |  |  | $ | 26,750 |
Summary of Exercise Price for Stock Options Outstanding and Exercisable | The exercise price for stock options outstanding and exercisable at September 30, 2019 is as follows:
Outstanding |  |  | Exercisable |
Number of |  |  | Exercise |  |  | Number of |  |  | Exercise |
Options |  |  | Price |  |  | Options |  |  | Price |
| 25,000 |  |  |  | 7.50 |  |  |  | 25,000 |  |  |  | 7.50 |
| 31,250 |  |  |  | 10.00 |  |  |  | 31,250 |  |  |  | 10.00 |
| 16,668 |  |  |  | 10.86 |  |  |  | 8,334 |  |  |  | 10.86 |
| 6,250 |  |  |  | 12.50 |  |  |  | 6,250 |  |  |  | 12.50 |
| 6,250 |  |  |  | 15.00 |  |  |  | 6,250 |  |  |  | 15.00 |
| 75,000 |  |  |  | 15.18 |  |  |  | 75,000 |  |  |  | 15.18 |
| 8,000 |  |  |  | 23.41 |  |  |  | 8,000 |  |  |  | 23.41 |
| 8,000 |  |  |  | 27.60 |  |  |  | 8,000 |  |  |  | 27.60 |
| 8,000 |  |  |  | 31.74 |  |  |  | — |  |  |  | — |
| 8,000 |  |  |  | 36.50 |  |  |  | — |  |  |  | — |
| 8,000 |  |  |  | 41.98 |  |  |  | — |  |  |  | — |
| 200,418 |  |  |  |  |  |  |  | 168,084 |  |  |  |  |
Summary of Non-Vested Shares | The following table summarizes information about the Company’s non-vested shares as of September 30, 2019:
|  |  |  |  |  | Average |
|  | Number of |  |  | Grant-Date |
Non-vested Shares |  | Shares |  |  | Fair Value |
Non-vested at September 30, 2018 |  |  | 48,501 |  |  | $ | 25.53 |
Vested |  |  | (12,167 | ) |  | $ | 21.87 |
Non-vested at September 30, 2019 |  |  | 36,334 |  |  | $ | 26.76 |
Summary of Assumptions in Calculating Fair Value of Stock Options Granted | The assumptions used in calculating the fair value of stock options granted use the Black-Scholes option pricing model for options granted during September 30, 2018 are as follows:
Risk-free interest rate |  | 1.25% |
Expected life of the options |  | 5 and 10 years |
Expected volatility |  | 107% |
Expected dividend yield |  | 0% |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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