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Shareholders' Equity (Initial Public Offering, Preferred Stock and Common Stock, Narrative) (Details) - USD ($) |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 27, 2021 | Aug. 10, 2009 | Jan. 31, 2018 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Initial Public Offering [Abstract] |  |  |  |  |  |
Initial public offering, issuance costs |  |  |  | $ 0 | $ 135,405 | $ 0
Preferred Stock [Abstract] |  |  |  |  |  |
Preferred stock, shares authorized |  |  |  | 20,000,000 |  |
Preferred stock, shares outstanding |  |  |  | 0 | 0 |
Common Stock [Abstract] |  |  |  |  |  |
Shelf Registration, sale of corporate securities (up to) | $ 19,000,000 |  | $ 100,000,000 |  |  |
Common stock |  |  |  |  |  |
Initial Public Offering [Abstract] |  |  |  |  |  |
Initial public offering, effective date |  | Aug. 10, 2009 |  |  |  |
Initial public offering, shares issued |  | 5,000,000 |  |  |  |
Initial public offering, price per share |  | $ 17.00 |  |  |  |
Initial public offering, gross proceeds |  | $ 85,000,000 |  |  |  |
Initial public offering, underwriting discounts |  | 6,000,000 |  |  |  |
Initial public offering, issuance costs |  | 4,200,000 |  |  |  |
Initial public offering, net proceeds |  | $ 74,800,000 |  |  |  |
Common stock |  |  |  |  |  |
Common Stock [Abstract] |  |  |  |  |  |
Share-based compensation, shares |  |  |  | 192,684 | 228,500 | 225,536

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