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

Goodwill (Narrative) (Details) - USD ($)	6 Months Ended		12 Months Ended
Goodwill (Narrative) (Details) - USD ($)	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	May 18, 2020
Goodwill [Line Items]
Goodwill	$ 9,551,000		$ 13,714,000	$ 9,551,000	$ 10,808,000	$ 4,163,000
Goodwill impairment	$ 0	$ 1,257,000	$ 0	$ 1,257,000	$ 0
Hearing Help Express (HHE) [Member]
Goodwill [Line Items]
Goodwill impairment		$ 1,257,000
Emerald Medical Services Pte., Ltd [Member]
Goodwill [Line Items]
Goodwill						$ 4,041,000