Income Taxes (Narrative) (Details) - MARYLAND [Member] - USD ($) $ in Millions |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Operating loss carryforwards | $ 39.2 | |
| Deferred tax assets, operating loss carryforwards, state and local | 2.6 | |
| Operating loss carryforward, valuation allowance | $ 2.6 | $ 2.4 |