Business Segments (Information by Segment) (Details) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net Sales	$ 196,300,000		$ 235,858,000	$ 414,740,000	$ 459,277,000
Restructuring Reserve	6,018,000	$ 6,549,000		6,018,000		$ 7,027,000
Charges	(1,685,000)	(1,392,000)	(1,321,000)	(3,077,000)	(2,013,000)
Gain on sale of business	200,000		0	9,790,000	0
Operating Income (Loss)	(2,239,000)		(4,510,000)	7,209,000	(8,988,000)
Loss (gain) on Convertible Debt Derivatives	0		1,470,000	0	1,197,000
Interest Revenue (Expense), Net	(7,031,000)		(7,602,000)	(13,647,000)	(14,787,000)
Earnings (loss) before income taxes	(15,869,000)		(10,642,000)	(13,037,000)	(22,578,000)
Loss on debt extinguishment including debt finance charges and fees	(6,599,000)		0	(6,599,000)	0
Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales	7,837,000		12,314,000	18,338,000	24,645,000
All Other
Segment Reporting Information [Line Items]
Restructuring Reserve	166,000	166,000		166,000		406,000
Charges	(82,000)	(36,000)	(346,000)	(118,000)	(165,000)
Operating Income (Loss)	(7,740,000)		(7,416,000)	(11,295,000)	(12,605,000)
Europe
Segment Reporting Information [Line Items]
Net Sales	101,894,000		133,991,000	222,862,000	258,835,000
Restructuring Reserve	5,749,000	6,043,000		5,749,000		6,410,000
Charges	(1,575,000)	(665,000)	(320,000)	(2,240,000)	(640,000)
Operating Income (Loss)	2,174,000		5,470,000	9,024,000	11,252,000
North America
Segment Reporting Information [Line Items]
Net Sales	86,569,000		89,553,000	173,540,000	175,797,000
Restructuring Reserve	103,000	340,000		103,000		211,000
Restructuring Reserve, Accrual Adjustment	28,000			719,000
Charges	(28,000)	(691,000)	(655,000)	(719,000)	(1,208,000)
Operating Income (Loss)	4,812,000		(1,243,000)	2,767,000	(5,622,000)
Operating Segments [Member] | Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales	7,837,000		12,314,000	18,338,000	24,645,000
Operating Segments [Member] | Europe
Segment Reporting Information [Line Items]
Net Sales	101,894,000		133,991,000	222,862,000	258,835,000
Operating Segments [Member] | North America
Segment Reporting Information [Line Items]
Net Sales	86,569,000		89,553,000	173,540,000	175,797,000
Intersegment revenues
Segment Reporting Information [Line Items]
Net Sales	26,434,000		26,007,000	53,671,000	53,123,000
Intersegment revenues | Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales	0		2,745,000	2,529,000	5,872,000
Intersegment revenues | Europe
Segment Reporting Information [Line Items]
Net Sales	4,185,000		3,820,000	8,411,000	7,272,000
Intersegment revenues | North America
Segment Reporting Information [Line Items]
Net Sales	22,249,000		19,442,000	42,731,000	39,979,000
Severance
Segment Reporting Information [Line Items]
Restructuring Reserve	6,014,000	6,545,000		6,014,000		7,023,000
Charges	(1,412,000)	(1,319,000)
Severance | All Other
Segment Reporting Information [Line Items]
Restructuring Reserve	166,000	166,000		166,000		406,000
Charges	(82,000)	(36,000)			(165,000)
Severance | Europe
Segment Reporting Information [Line Items]
Restructuring Reserve	5,745,000	6,039,000		5,745,000		6,406,000
Charges	(1,302,000)	(592,000)			(640,000)
Severance | North America
Segment Reporting Information [Line Items]
Restructuring Reserve	103,000	340,000		103,000		211,000
Charges	(28,000)	(691,000)			(1,164,000)
Contract Termination
Segment Reporting Information [Line Items]
Restructuring Reserve	4,000	4,000		4,000		4,000
Charges	(273,000)	(73,000)
Contract Termination | All Other
Segment Reporting Information [Line Items]
Restructuring Reserve	0	0		0		0
Charges	0	0
Contract Termination | Europe
Segment Reporting Information [Line Items]
Restructuring Reserve	4,000	4,000		4,000		4,000
Charges	(273,000)	(73,000)
Contract Termination | North America
Segment Reporting Information [Line Items]
Restructuring Reserve	0	0		0		$ 0
Restructuring Reserve, Accrual Adjustment	0	$ 0
Charges					(44,000)
Lifestyle Products [Domain] | Operating Segments [Member] | Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales	3,669,000		2,552,000	6,801,000	5,260,000
Lifestyle Products [Domain] | Operating Segments [Member] | Europe
Segment Reporting Information [Line Items]
Net Sales	52,018,000		60,866,000	110,321,000	122,700,000
Lifestyle Products [Domain] | Operating Segments [Member] | North America
Segment Reporting Information [Line Items]
Net Sales	40,502,000		44,855,000	83,043,000	87,858,000
Mobility and Seating [Domain] | Operating Segments [Member] | Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales	2,652,000		7,454,000	8,087,000	15,341,000
Mobility and Seating [Domain] | Operating Segments [Member] | Europe
Segment Reporting Information [Line Items]
Net Sales	39,646,000		62,802,000	92,424,000	116,533,000
Mobility and Seating [Domain] | Operating Segments [Member] | North America
Segment Reporting Information [Line Items]
Net Sales	26,339,000		29,919,000	55,913,000	58,386,000
Respiratory Therapy [Domain] | Operating Segments [Member] | Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales	315,000		716,000	848,000	888,000
Respiratory Therapy [Domain] | Operating Segments [Member] | Europe
Segment Reporting Information [Line Items]
Net Sales	5,679,000		5,446,000	10,610,000	9,956,000
Respiratory Therapy [Domain] | Operating Segments [Member] | North America
Segment Reporting Information [Line Items]
Net Sales	19,572,000		14,298,000	34,221,000	28,703,000
Other [Domain] | Operating Segments [Member] | Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales	1,201,000		1,592,000	2,602,000	3,156,000
Other [Domain] | Operating Segments [Member] | Europe
Segment Reporting Information [Line Items]
Net Sales	4,551,000		4,877,000	9,507,000	9,646,000
Other [Domain] | Operating Segments [Member] | North America
Segment Reporting Information [Line Items]
Net Sales	$ 156,000		$ 481,000	$ 363,000	$ 850,000