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Revenue Recognition (Schedule Of Contract Assets And Liabilities) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Opening [Member] |  |
Contract Receivables and Liabilities [Line Items] |  |
Receivables | $ 326 | $ 305
Contract Liabilities | 663 | 219
Closing [Member] |  |
Contract Receivables and Liabilities [Line Items] |  |
Receivables | 19 | 320
Contract Liabilities | 722 | 214
Increase/(Decrease) [Member] |  |
Contract Receivables and Liabilities [Line Items] |  |
Receivables | (307) | 15
Contract Liabilities | $ 59 | $ (5)

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- Definition Amount of decrease in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time from transfer to receivable due to right to consideration becoming unconditional. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130551-203045 + Details
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Balance Type: | credit
Period Type: | duration

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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045 + Details
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- Details
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- Details
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Namespace Prefix: |
Data Type: | na
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- Details
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Balance Type: |
Period Type: |