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Basis of Presentation (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) shares
Nature Of Business And Significant Accounting Policies [Abstract]
Unrecognized Share Based Compensation	$ 9
Number of Years To Recognize Remaining Expense	2 years
Options excluded from the computations of diluted weighted-average shares outstanding | shares	6,812
Accounting Standards Update No. 2016-01 [Member]
Recently Adopted Accounting Pronouncement [Line Items]
Reclassification of net unrealized losses from accumulated other comprehensive income (AOCI) to retained earnings	$ 7

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested options awarded to employees as compensation.

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