Revenue, Net (Schedule Of Net Revenue By Market) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue, Major Customer [Line Items]
Total Net Revenue	$ 23,602	$ 29,336	$ 45,105	$ 58,906
Products and Services Transferred at Point in Time [Member]
Revenue, Major Customer [Line Items]
Total Net Revenue	8,479	8,444	14,810	17,221
Products and Services Transferred over Time [Member]
Revenue, Major Customer [Line Items]
Total Net Revenue	15,123	20,892	30,295	41,685
Medical, Diabetes [Member]
Revenue, Major Customer [Line Items]
Total Net Revenue	13,521	17,950	27,051	35,114
Medical, Diabetes [Member] | Products and Services Transferred over Time [Member]
Revenue, Major Customer [Line Items]
Total Net Revenue	13,521	17,950	27,051	35,114
Medical, Other Medical [Member]
Revenue, Major Customer [Line Items]
Total Net Revenue	4,597	2,942	7,425	6,571
Medical, Other Medical [Member] | Products and Services Transferred at Point in Time [Member]
Revenue, Major Customer [Line Items]
Total Net Revenue	2,995		4,181
Medical, Other Medical [Member] | Products and Services Transferred over Time [Member]
Revenue, Major Customer [Line Items]
Total Net Revenue	1,602	2,942	3,244	6,571
Hearing Health Value Based DTEC [Member]
Revenue, Major Customer [Line Items]
Total Net Revenue	1,387	1,736	2,560	3,366
Hearing Health Value Based DTEC [Member] | Products and Services Transferred at Point in Time [Member]
Revenue, Major Customer [Line Items]
Total Net Revenue	1,387	1,736	2,560	3,366
Hearing Health Value Based ITEC [Member]
Revenue, Major Customer [Line Items]
Total Net Revenue	1,365	2,399	2,109	4,976
Hearing Health Value Based ITEC [Member] | Products and Services Transferred at Point in Time [Member]
Revenue, Major Customer [Line Items]
Total Net Revenue	1,365	2,399	2,109	4,976
Hearing Health Legacy OEM [Member]
Revenue, Major Customer [Line Items]
Total Net Revenue	1,721	2,540	3,685	5,343
Hearing Health Legacy OEM [Member] | Products and Services Transferred at Point in Time [Member]
Revenue, Major Customer [Line Items]
Total Net Revenue	1,721	2,540	3,685	5,343
Professional Audio Communications [Member]
Revenue, Major Customer [Line Items]
Total Net Revenue	1,011	1,769	2,275	3,536
Professional Audio Communications [Member] | Products and Services Transferred at Point in Time [Member]
Revenue, Major Customer [Line Items]
Total Net Revenue	$ 1,011	$ 1,769	$ 2,275	$ 3,536