Other Assets, Net (Narrative) (Details) € in Thousands, $ in Thousands	1 Months Ended	9 Months Ended
	Jan. 31, 2019 EUR (€)	Sep. 30, 2019 USD ($)	Jan. 31, 2019 USD ($)
Other Assets, Net [Line Items]
Period of future quartely installments of non-cash amounts, software capitalization		4 years
Software Purchase, Outstanding Liabilities		$ 1,260
Cash Paid At Closing [Member]
Other Assets, Net [Line Items]
Software, capitalized cost			$ 586
Software, Future Quarterly Installments Next Four Years [Member]
Other Assets, Net [Line Items]
Software, capitalized cost			869
Due In January 2023 [Member]
Other Assets, Net [Line Items]
Software, capitalized cost			533
Software, Value Of Partnership And License Agreement Transferred [Member]
Other Assets, Net [Line Items]
Software, capitalized cost			$ 1,691
Soundperience [Member]
Other Assets, Net [Line Items]
Payments for Software | €	€ 1,750
Percent Of Ownership Interest Transferred	49.00%