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Share-Based Compensation (Tables) | 12 Months Ended
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Sep. 30, 2021
Stock Based Incentive Compensation Plan 2009 |
Share-Based compensation |
Summary of option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  |  |  | Weighted |  | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Aggregate
​ | ​ | ​ | ​ | Exercise | ​ | Intrinsic
​ | ​ | Options | ​ | Price | ​ | Value
Outstanding at September 30, 2018 |  | 550,834 | ​ | $ | 3.32 | ​ | $ | 15,000
Granted |  | — | ​ | ​ | — | ​ | ​ | —
Exercised |  | — | ​ | ​ | — | ​ | ​ | —
Cancelled |  | — | ​ | ​ | — | ​ | ​ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at September 30, 2019 |  | 550,834 | ​ | $ | 3.32 | ​ | $ | 761,767
Granted |  | — | ​ |  | — | ​ |  | —
Exercised |  | (546,334) | ​ | ​ | 3.31 | ​ | ​ | 1,926,782
Cancelled |  | ​ | ​ | ​ | ​ | ​ |  | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at September 30, 2020 |  | 4,500 | ​ | $ | 3.78 | ​ | $ | 13,770
Granted |  | — | ​ |  | — | ​ |  | —
Exercised |  | (4,500) | ​ | ​ | 3.78 | ​ | ​ | 9,892
Cancelled |  | ​ | ​ | ​ | ​ | ​ |  | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at September 30, 2021 |  | — | ​ | $ | — | ​ | $ | —
Vested and expected to vest |  | — | ​ | $ | — | ​ | $ | —
Options exercisable at September 30, 2021 |  | — | ​ | $ | — | ​ | $ | —
Summary of information about stock options | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Options Outstanding | ​ | Options Exercisable
​ | ​ | Outstanding | ​ | Weighted- | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of | ​ | Average | ​ | Weighted- | ​ | ​ | ​ | Weighted-
Range of Exercise | ​ | September 30, | ​ | Remaining | ​ | Average | ​ | As of September | ​ | Average
Prices |  | 2021 |  | Contractual Life |  | Exercise Price |  | 30, 2021 |  | Exercise Price
$0.00 - $5.00 |  | — |  | — | ​ | $ | — |  | — | ​ | $ | —
2019 Plan |
Share-Based compensation |
Summary of option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted |  | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Aggregate
​ | ​ | ​ | ​ | Exercise | ​ | Intrinsic
​ | ​ | Options | ​ | Price | ​ | Value
Outstanding at September 30, 2019 |  | — | ​ | $ | — | ​ | $ | —
Granted |  | 100,000 | ​ | ​ | 7.10 | ​ |  | —
Exercised |  | — | ​ | ​ | — | ​ |  | —
Cancelled |  | — | ​ | ​ | — | ​ |  | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at September 30, 2020 |  | 100,000 | ​ | $ | 7.10 | ​ | $ | —
Granted |  | — | ​ | ​ | — | ​ |  | —
Exercised |  | — | ​ | ​ | — | ​ |  | —
Cancelled |  | ​ | ​ | ​ | ​ | ​ |  | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at September 30, 2021 |  | 100,000 | ​ | $ | 7.10 | ​ | $ | —
Vested and expected to vest |  | 100,000 | ​ | $ | 7.10 | ​ | $ | —
Options exercisable at September 30, 2021 |  | 50,000 | ​ | $ | 7.10 | ​ | $ | —
Summary of information about stock options | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Options Outstanding | ​ | Options Exercisable
​ | ​ | Outstanding | ​ | Weighted- | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of | ​ | Average | ​ | Weighted- | ​ | ​ | ​ | Weighted-
Range of Exercise | ​ | September 30, | ​ | Remaining | ​ | Average | ​ | As of September | ​ | Average
Prices | ​ | 2020 | ​ | Contractual Life | ​ | Exercise Price | ​ | 30, 2020 | ​ | Exercise Price
$0.00 - $8.00 |  | 100,000 |  | 8.9 | ​ | $ | 7.10 |  | 50,000 | ​ | $ | 7.10
Schedule of fair value assumptions used to record compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Fiscal Year Ended September 30, |
​ |  | 2021 (1) |  | 2020 |  | 2019 (1) |
Expected dividend rate | ​ | — |  | — |  | — | ​
Expected volatility | ​ | — | % | 58.4 | % | — | %
Weighted average risk-free interest rate | ​ | — | % | 0.3 | % | — | %
Expected lives (years) | ​ | — |  | 5.5 |  | — | ​
(1)The Company did not grant any options in fiscal 2021 and 2019 ​

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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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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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