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Debt (Schedule Of Interest Information) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Debt Instrument [Line Items] |  |  |
Interest expense related to debt, including commitment fees | $ (257) | $ (997) | $ (1,353)
Deferred finance costs amortization | (191) | (369) | (319)
Deferred finance cost write-off due to loan modification |  |  | (869)
Interest income | 270 | 7 | 3
Other interest not related to debt | 33 | (55) | (75)
Interest expense, net | $ (145) | $ (1,414) | $ (2,613)
Various Debt Instruments [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Average effective interest rate, excluding commitment fees | 7.09% | 6.72% | 5.52%

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- Definition Amount of amortization expense attributable to debt issuance costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(8)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
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