Revenue By Market (Schedule Of Net Revenue By Market) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue, Major Customer [Line Items]
Total Net Sales	$ 69,739	$ 68,303	$ 52,961
Medical [Member]
Revenue, Major Customer [Line Items]
Total Net Sales	40,821	35,109	25,978
Hearing Health [Member]
Revenue, Major Customer [Line Items]
Total Net Sales	21,089	22,959	19,739
Professional Audio Communications [Member]
Revenue, Major Customer [Line Items]
Total Net Sales	$ 7,829	$ 10,235	$ 7,244