Business Segments (Information by Segment) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net Sales	$ 218,440,000	$ 223,419,000
Restructuring Reserve	6,549,000		$ 7,027,000
Charges	(1,392,000)	(692,000)
Gain on sale of business	9,590,000	0
Operating Income (Loss)	9,448,000	(4,478,000)
Loss (gain) on Convertible Debt Derivatives	0	(273,000)
Interest Revenue (Expense), Net	(6,616,000)	(7,185,000)
Earnings (loss) before income taxes	2,832,000	(11,936,000)
Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales	10,501,000	12,331,000
All Other
Segment Reporting Information [Line Items]
Restructuring Reserve	166,000		406,000
Charges	(36,000)	181,000
Operating Income (Loss)	(3,555,000)	(5,189,000)
Europe
Segment Reporting Information [Line Items]
Net Sales	120,968,000	124,844,000
Restructuring Reserve	6,043,000		6,410,000
Charges	(665,000)	(320,000)
Operating Income (Loss)	6,850,000	5,782,000
North America
Segment Reporting Information [Line Items]
Net Sales	86,971,000	86,244,000
Restructuring Reserve	340,000		211,000
Restructuring Reserve, Accrual Adjustment	691,000
Charges	(691,000)	(553,000)
Operating Income (Loss)	(2,045,000)	(4,379,000)
Operating Segments [Member] | Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales	10,501,000	12,331,000
Operating Segments [Member] | Europe
Segment Reporting Information [Line Items]
Net Sales	120,968,000	124,844,000
Operating Segments [Member] | North America
Segment Reporting Information [Line Items]
Net Sales	86,971,000	86,244,000
Intersegment revenues
Segment Reporting Information [Line Items]
Net Sales	27,237,000	27,116,000
Intersegment revenues | Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales	2,529,000	3,127,000
Intersegment revenues | Europe
Segment Reporting Information [Line Items]
Net Sales	4,226,000	3,452,000
Intersegment revenues | North America
Segment Reporting Information [Line Items]
Net Sales	20,482,000	20,537,000
Severance
Segment Reporting Information [Line Items]
Restructuring Reserve	6,545,000		7,023,000
Charges	(1,319,000)
Severance | All Other
Segment Reporting Information [Line Items]
Restructuring Reserve	166,000		406,000
Charges	(36,000)	181,000
Severance | Europe
Segment Reporting Information [Line Items]
Restructuring Reserve	6,039,000		6,406,000
Charges	(592,000)	(320,000)
Severance | North America
Segment Reporting Information [Line Items]
Restructuring Reserve	340,000		211,000
Charges	(691,000)	(531,000)
Contract Termination
Segment Reporting Information [Line Items]
Restructuring Reserve	4,000		4,000
Charges	(73,000)
Contract Termination | All Other
Segment Reporting Information [Line Items]
Restructuring Reserve	0		0
Charges	0
Contract Termination | Europe
Segment Reporting Information [Line Items]
Restructuring Reserve	4,000		4,000
Charges	(73,000)
Contract Termination | North America
Segment Reporting Information [Line Items]
Restructuring Reserve	0		$ 0
Restructuring Reserve, Accrual Adjustment	0
Charges		(22,000)
Lifestyle Products [Domain] | Operating Segments [Member] | Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales	3,132,000	2,708,000
Lifestyle Products [Domain] | Operating Segments [Member] | Europe
Segment Reporting Information [Line Items]
Net Sales	58,303,000	61,834,000
Lifestyle Products [Domain] | Operating Segments [Member] | North America
Segment Reporting Information [Line Items]
Net Sales	42,541,000	43,003,000
Mobility and Seating [Domain] | Operating Segments [Member] | Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales	5,435,000	7,887,000
Mobility and Seating [Domain] | Operating Segments [Member] | Europe
Segment Reporting Information [Line Items]
Net Sales	52,778,000	53,731,000
Mobility and Seating [Domain] | Operating Segments [Member] | North America
Segment Reporting Information [Line Items]
Net Sales	29,574,000	28,467,000
Respiratory Therapy [Domain] | Operating Segments [Member] | Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales	533,000	172,000
Respiratory Therapy [Domain] | Operating Segments [Member] | Europe
Segment Reporting Information [Line Items]
Net Sales	4,931,000	4,510,000
Respiratory Therapy [Domain] | Operating Segments [Member] | North America
Segment Reporting Information [Line Items]
Net Sales	14,649,000	14,405,000
Other [Domain] | Operating Segments [Member] | Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales	1,401,000	1,564,000
Other [Domain] | Operating Segments [Member] | Europe
Segment Reporting Information [Line Items]
Net Sales	4,956,000	4,769,000
Other [Domain] | Operating Segments [Member] | North America
Segment Reporting Information [Line Items]
Net Sales	$ 207,000	$ 369,000