Revenue By Market (Schedule Of Net Revenue By Market) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Total Revenue	$ 17,005	$ 12,330	$ 51,822	$ 37,935
Medical [Member]
Segment Reporting Information [Line Items]
Total Revenue	8,664	5,451	27,377	17,465
Hearing Health [Member]
Segment Reporting Information [Line Items]
Total Revenue	5,533	4,986	17,009	15,213
Professional Audio Communications [Member]
Segment Reporting Information [Line Items]
Total Revenue	$ 2,808	$ 1,893	$ 7,436	$ 5,257