Segment Reporting (Summary Of Data By Industry Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Revenue, net	$ 25,363	$ 21,215
Income (loss) from continuing operations	757	(378)
Identifiable assets (excluding goodwill)	48,761	34,452
Goodwill	10,808	10,555	$ 10,808
Depreciation and amortization	654	562
Capital expenditures	485	273
Body Worn Devices Segment [Member]
Revenue, net	23,572	19,799
Income (loss) from continuing operations	1,210	75
Identifiable assets (excluding goodwill)	42,121	30,416
Goodwill	9,551	9,551
Depreciation and amortization	604	495
Capital expenditures	475	213
Hearing Health Direct-to-Consumer [Member]
Revenue, net	1,791	1,416
Income (loss) from continuing operations	(453)	(453)
Identifiable assets (excluding goodwill)	6,640	4,036
Goodwill	1,257	1,004
Depreciation and amortization	50	67
Capital expenditures	$ 10	$ 60

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- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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