Segment Reporting (Summary Of Data By Industry Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Revenue, net	$ 20,088	$ 18,064
Income (loss) from operations	(536)	281
Identifiable assets (excluding goodwill)	34,452
Goodwill	10,555		$ 10,555
Depreciation and amortization	562	494
Capital expenditures	273	$ 624
Body Worn Devices [Member]
Revenue, net	18,672
Income (loss) from operations	(83)
Identifiable assets (excluding goodwill)	30,416
Goodwill	9,551
Depreciation and amortization	495
Capital expenditures	213
Hearing Health Direct-to-Consumer [Member]
Revenue, net	1,416
Income (loss) from operations	(453)
Identifiable assets (excluding goodwill)	4,036
Goodwill	1,004
Depreciation and amortization	67
Capital expenditures	$ 60

Identifiable Assets, Excluding Goodwill

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Section 45
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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

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