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Equity Compensation Plans - Options (Details) - USD ($) |  | 12 Months Ended
--- | --- | ---
Dec. 31, 2009 | Dec. 31, 2021 | Dec. 31, 2019
2009 Plan |  |  |
Equity Compensation Plans |  |  |
Granted (in shares) | 16,500 | 0 |
Exercised (in shares) |  | 0 | 4,500
Shares |  |  |
Exercised (in shares) |  | 0 | (4,500)
Ending outstanding (in shares) |  | 0 |
Employee and Nonemployee Stock Options [Member] |  |  |
Equity Compensation Plans |  |  |
Total unrecognized compensation cost |  | $ 0 |
Aggregate Intrinsic Value |  |  |
Exercised (in dollars) |  |  | $ (27,000)

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