Goodwill And Intangible Assets (Schedule Of Goodwill) (Details) $ in Thousands	9 Months Ended
Sep. 30, 2019 USD ($)
Goodwill and Intangible Assets [Abstract]
Goodwill, Beginning Balance	$ 10,808
Impairment of goodwill of Hearing Help Express	(1,257)
Goodwill, Ending Balance	$ 9,551

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration