Business Segments (Information by Segment) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Net Sales	$ 231,723,000	$ 257,552,000
Charges	(3,283,000)	(102,000)
Operating Income (Loss)	(10,651,000)	(5,076,000)
Loss (gain) on Convertible Debt Derivatives	901,000	604,000
Interest Revenue (Expense), Net	(4,430,000)	(2,319,000)
Earnings (loss) before income taxes	(14,180,000)	(6,791,000)
Europe (1)
Segment Reporting Information [Line Items]
Net Sales	119,508,000	122,031,000
Charges	(690,000)	0
Operating Income (Loss)	5,100,000	5,963,000
NA/HME (1)
Segment Reporting Information [Line Items]
Net Sales	84,262,000	107,672,000
Net sales	1,301,000
Charges	(2,242,000)	(61,000)
Operating Income (Loss)	(9,426,000)	(6,409,000)
Operating Income (Loss)	107,000
IPG
Segment Reporting Information [Line Items]
Net Sales	16,373,000	18,244,000
Operating Income (Loss)	1,898,000	1,424,000
Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales	11,580,000	9,605,000
Charges	(351,000)	(41,000)
Operating Income (Loss)	(430,000)	(703,000)
All Other
Segment Reporting Information [Line Items]
Operating Income (Loss)	(4,510,000)	(5,249,000)
Intersegment revenues
Segment Reporting Information [Line Items]
Net Sales	30,398,000	35,844,000
Intersegment revenues | Europe (1)
Segment Reporting Information [Line Items]
Net Sales	3,675,000	2,592,000
Intersegment revenues | NA/HME (1)
Segment Reporting Information [Line Items]
Net Sales	22,095,000	27,615,000
Intersegment revenues | IPG
Segment Reporting Information [Line Items]
Net Sales	768,000	416,000
Intersegment revenues | Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales	$ 3,860,000	$ 5,221,000