INTANGIBLE ASSETS (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization of Finite-Lived Intangible Assets	$ 400,000	$ 600,000
Amortizing Identifiable Intangible Assets [Abstract]
Gross	111,070,000		112,145,000
Accumulated Amortization	(108,998,000)		(109,700,000)
Net	2,072,000		2,445,000
Future expected amortization expense, identifiable intangible assets
2015	1,100,000
2016	1,000,000
Completed Technologies and Patents [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	51,277,000		51,950,000
Accumulated Amortization	(51,277,000)		(51,950,000)
Net	0		0
Customer Relationships [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	48,864,000		49,216,000
Accumulated Amortization	(46,792,000)		(46,771,000)
Net	2,072,000		2,445,000
Trade Names [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	5,901,000		5,936,000
Accumulated Amortization	(5,901,000)		(5,936,000)
Net	0		0
Capitalized Software Costs [Member]
Amortizing Identifiable Intangible Assets [Abstract]
Gross	5,028,000		5,043,000
Accumulated Amortization	(5,028,000)		(5,043,000)
Net	$ 0		$ 0