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Commitments And Contingencies (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Business Agreement Termination [Line Items]        
Total rent expense $ 194 $ 257 $ 397 $ 622
Arbitration award   $ 1,967   1,967
PIEPS VECTOR Avalanche Transceivers [Member]        
Business Agreement Termination [Line Items]        
Arbitration award       $ 1,967