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Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Business Agreement Termination [Line Items] |  |  |  |
Total rent expense | $ 214 | $ 204 | $ 611 | $ 826
Arbitration award |  |  |  | 1,967
PIEPS VECTOR Avalanche Transceivers [Member] |  |  |  |
Business Agreement Termination [Line Items] |  |  |  |
Arbitration award |  |  |  | $ 1,967

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- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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