| Property And Equipment (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended | ||
|---|---|---|---|
| Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | |
| Property And Equipment [Abstract] | |||
| Depreciation expense | $ 4,550 | $ 4,423 | $ 2,883 | 
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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
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- References No definition available. 
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