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Basis of Presentation and Summary of Significant Accounting Policies (Cumulative Effect of Changes from Adoption of ASU) (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Assets |  |  |
Right of use assets | $ 541 | $ 451 | $ 0
Liabilities |  |  |
Current portion of operating leases | 148 | 126 | 0
Long term portion of operating leases | $ 393 | 325 | $ 0
Accounting Standards Update 2016-02 |  |  |
Assets |  |  |
Right of use assets |  | 451 |
Liabilities |  |  |
Current portion of operating leases |  | 126 |
Long term portion of operating leases |  | $ 325 |

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