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Stock-Based Compensation (Tables) | 6 Months Ended
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Mar. 31, 2021
Share Based Compensation [Abstract] |
Summary of Stock Option Activity | The following table summarizes stock option activity for the twelve months ended September 30, 2020 and the six months ended March 31, 2021:
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life |  |  | Intrinsic Value |
Outstanding at September 30, 2019 |  |  | 200,418 |  |  | $ | 16.37 |  |  |  | 2.40 |  |  | $ | 27 |
Forfeited |  |  | (81,250 | ) |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at September 30, 2020 |  |  | 119,168 |  |  | $ | 19.07 |  |  |  | 2.71 |  |  | $ | — |
Exercisable at September 30, 2020 |  |  | 95,001 |  |  | $ | 15.50 |  |  |  | 1.55 |  |  | $ | — |
Outstanding at September 30, 2020 |  |  | 119,168 |  |  | $ | 19.07 |  |  |  | 2.71 |  |  | $ | — |
Granted |  |  | 1,250 |  |  |  |  |  |  |  |  |  |  |  |  |
Exercised |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeited |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at March 31, 2021 |  |  | 120,418 |  |  | $ | 19.12 |  |  |  | 2.87 |  |  | $ | 564 |
Exercisable at March 31, 2021 |  |  | 107,168 |  |  | $ | 16.71 |  |  |  | 2.19 |  |  | $ | 564 |
Summary of Exercise Price for Stock Options Outstanding and Exercisable | The exercise price for stock options outstanding and exercisable outstanding at March 31, 2021 is as follows:
Outstanding |  |  | Exercisable |
Number of Options |  |  | Exercise Price ($) |  |  | Number of Options |  |  | Exercise Price ($) |
| 25,000 |  |  |  | 10.00 |  |  |  | 25,000 |  |  |  | 10.00 |
| 16,668 |  |  |  | 10.86 |  |  |  | 16,668 |  |  |  | 10.86 |
| 6,250 |  |  |  | 12.50 |  |  |  | 6,250 |  |  |  | 12.50 |
| 6,250 |  |  |  | 15.00 |  |  |  | 6,250 |  |  |  | 15.00 |
| 25,000 |  |  |  | 15.18 |  |  |  | 25,000 |  |  |  | 15.18 |
| 8,000 |  |  |  | 23.41 |  |  |  | 8,000 |  |  |  | 23.41 |
| 1,250 |  |  |  | 23.89 |  |  |  | — |  |  |  | — |
| 8,000 |  |  |  | 27.60 |  |  |  | 8,000 |  |  |  | 27.60 |
| 8,000 |  |  |  | 31.74 |  |  |  | 8,000 |  |  |  | 31.74 |
| 8,000 |  |  |  | 36.50 |  |  |  | 4,000 |  |  |  | 36.50 |
| 8,000 |  |  |  | 41.98 |  |  |  | — |  |  |  | — |
| 120,418 |  |  |  |  |  |  |  | 107,168 |  |  |  |  |
Summary of Non-Vested Shares | The following table summarizes information about the Company’s non-vested shares outstanding as of March 31, 2021:
Non-vested Shares |  | Number of Shares |  |  | Average Grant-Date Fair Value |
Non-vested at September 30, 2020 |  |  | 24,167 |  |  | $ | 33.10 |
Granted |  |  | 1,250 |  |  | $ | 23.89 |
Vested |  |  | (12,167 | ) |  | $ | 26.15 |
Non-vested at March 31, 2021 |  |  | 13,250 |  |  | $ | 38.62 |
Summary of Black-Scholes Model Valuation Assumptions for Stock Options Granted | The following table depicts the Black-Scholes model valuation assumptions for the stock options granted during the six months ended March 31, 2021. There were no stock option grants during the six months ended March 31, 2020.
Risk-free interest rate |  | 1.15% |
Expected life of the options |  | 6 years |
Expected volatility |  | 99% |
Expected dividend yield |  | 0% |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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=120381028&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=120381028&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=120381028&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=120381028&loc=d3e5070-113901 + Details
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