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Income Taxes (Narrative) (Details) - USD ($) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2012 | Dec. 31, 2019
Proceeds from sale of common stock |  |  | $ 22,500,000 |
Net operating loss carry forwards | $ 22,579,000 |  |  |
Carryforwards utilize limit before the stock offering closed | 163,000 |  |  |
Unutilized operating loss carryforwards that will expire | 20,520,000 |  |  |
Reduced deferred tax assets and valuation allowance | $ 6,977,000 |  |  |
Deferred tax liability to be recorded |  |  |  | $ 473,000
Effective tax rate | 20.50% | 20.00% |  |
Additional bad debt deductions | $ 2,250,000 |  |  |
Deferred tax asset, valuation allowance | 0 |  |  |
Deferred tax asset | 1,600,000 |  |  | 1,700,000
Unrecognized tax benefits | $ 0 |  |  | $ 0
Minimum [Member] |  |  |  |
Net operating loss carryforwards, expiration date | Jan. 01, 2024 |  |  |
Maximum [Member] |  |  |  |
Net operating loss carryforwards, expiration date | Dec. 31, 2033 |  |  |

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