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Equity Transactions - Stock Appreciation Rights Activity (Details) - Stock appreciation rights - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
SARs |  |
Outstanding as of beginning of period (in shares) | 160,810 |
Exercised (in shares) | (45,084) |
Forfeited (in shares) | (73,681) |
Outstanding as of end of period (in shares) | 42,045 | 160,810
Vested and expected to vest as of September 30, 2019 (in shares) | 42,045 |
Exercisable as of September 30, 2019 (in shares) | 12,045 |
Weighted- Average Exercise Price |  |
Outstanding as of beginning of period (in dollars per share) | $ 8.45 |
Exercised (in dollars per share) | 8.45 |
Forfeited (in dollars per share) | 9.80 |
Outstanding as of end of period (in dollars per share) | 6.11 | $ 8.45
Vested and expected to vest as of end of period (in dollars per share) | 6.11 |
Exercisable as of end of period (in dollars per share) | $ 6.11 |
Weighted- Average Remaining Contractual Term (years) |  |
Outstanding, weighted-average remaining contractual term | 1 year 3 months 3 days | 1 year
Vested and expected to vest as of end of period, weighted-average remaining contractual term | 1 year 3 months 3 days |
Exercisable as of end of period, weighted average remaining contractual term | 1 year 3 months 3 days |
Aggregate Intrinsic Value |  |
Outstanding as of beginning of period, aggregate intrinsic value | $ 96 |
Exercised, aggregate intrinsic value | 443 |
Forfeited, aggregate intrinsic value | 213 |
Outstanding as of end of period, aggregate intrinsic value | 652 | $ 96
Vested and expected to vest as of end of period, aggregate intrinsic value | 652 |
Exercisable as of end of period, aggregate intrinsic value | $ 187 |

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- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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