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Income Taxes (Operating Loss Carryforwards, Narrative) (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2017
Operating Loss Carryforwards [Line Items] |  |  |  |
Cumulative effect from change in accounting principle (Note 12) |  |  |  | $ 1,082,924
Valuation allowance | $ 18,511,161 | $ 17,382,052 |  |
Net tax benefit |  |  | $ 100,000 |
Valuation allowance for deferred tax assets: |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Charged to costs and expenses | 1,129,109 | 1,749,817 | $ (665,039) |
Retained earnings |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Cumulative effect from change in accounting principle (Note 12) |  |  |  | $ 1,082,924
Federal |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards | $ 57,181,428 |  |  |
State |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards |  | $ 60,198,158 |  |

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