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Equity Incentive Plan (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2020 | May 31, 2020
2020 Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Issuance of Common stock |  |  |  |  |  |  | 700,000
Common Stock, Capital Shares Reserved for Future Issuance | 488,985 |  | 488,985 |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period |  |  | 5 years |  |  |  |
Recognized share based compensation | $ 800 | $ 800 | $ 2,600 | $ 2,400 |  |  |
Unrecognized compensation, other than options | 10,000 |  | $ 10,000 |  |  |  |
Unrecognized compensation recognition period |  |  | 3 years 6 months |  |  |  |
Fair value inputs forfeiture rate |  |  | 0.00% |  |  |  |
Intrinsic value of restricted shares |  |  | $ 1,800 | 1,600 |  |  |
Restricted Stock [Member] | Maximum [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Intrinsic value of restricted shares | 100 | 100 |  |  |  |  |
Performance Shares [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period |  |  | 3 years |  |  | 3 years |
Recognized share based compensation | (100) |  | $ 100 |  |  |  |
Unrecognized compensation, other than options | 200 |  | $ 200 |  |  |  |
Unrecognized compensation recognition period |  |  | 1 year 4 months 24 days |  |  |  |
Performance Units And Shares [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period |  |  | 3 years |  |  |  |
Recognized share based compensation | 100 | $ 400 | $ 800 | $ 1,100 |  |  |
Unrecognized compensation, other than options | $ 3,500 |  | $ 3,500 |  |  |  |
Unrecognized compensation recognition period |  |  | 3 years 6 months |  |  |  |
Fair value inputs forfeiture rate |  |  | 0.00% |  |  |  |
Amortization period of compensation expense |  |  | 5 years |  |  |  |
Expected term (years) |  |  | 2 years 10 months 24 days | 2 years 10 months 24 days | 2 years 10 months 24 days |  |
Volatility |  |  | 33.90% | 18.40% | 19.70% |  |
Risk-free rate |  |  | 0.20% | 1.30% | 2.50% |  |
Performance Units And Shares [Member] | 3 Year Performance period completed |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period |  |  | 3 years |  |  |  |
Vesting percentage |  |  | 50.00% |  |  |  |
Performance Units And Shares [Member] | 3 Year Performance period to be completed |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period |  |  | 3 years |  |  |  |
Vesting percentage |  |  | 50.00% |  |  |  |
Performance Units And Shares [Member] | Maximum [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period |  |  | 5 years |  |  |  |

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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + 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)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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