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Summary Of Significant Accounting Policies (Accounting Changes To Consolidated Statements Of Cash Flows) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |
Net income (loss) | $ (5,955) | $ (2,141)
Change in net deferred tax assets | 471 | (166)
Accounts payable and accrued expenses | (3,552) | (2,145)
Net cash provided by operating activities | $ (8,672) | (3,842)
Tax Year 2019 [Member] |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |
Net income (loss) |  | (2,141)
Change in net deferred tax assets |  | (166)
Accounts payable and accrued expenses |  | (2,145)
Net cash provided by operating activities |  | (3,842)
Tax Year 2019 [Member] | As Reported [Member] |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |
Net income (loss) |  | (2,097)
Change in net deferred tax assets |  | (151)
Accounts payable and accrued expenses |  | (2,204)
Net cash provided by operating activities |  | (3,842)
Tax Year 2019 [Member] | Adjustments [Member] |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |
Net income (loss) |  | (44)
Change in net deferred tax assets |  | (15)
Accounts payable and accrued expenses |  | $ 59

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