Nature of Operations, Basis of Presentation and Summary of Significant Accounting Policies (Details) (USD $)	0 Months Ended		3 Months Ended								12 Months Ended
	Aug. 01, 2013	Jun. 20, 2011	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014 Transaction	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011 sqft
Nature of Operations, Basis of Presentation and Summary of Significant Accounting Policies [Abstract]
Purchase price (cash consideration)		$ 22,400,000
Area of manufacturing facility acquired														80,000
Sales price of discontinued operation	30,000,000
Contingent earn-out	2,250,000
Loss from sale of discontinued operation											0	11,985,000	571,000
Impairment charge included in the loss from sale of discontinued operation	2,500,000
Cash and Cash Equivalents [Abstract]
Duration of cash and cash equivalents included in liquid investments maximum											3 days
Income Taxes [Abstract]
Number of years considered for cumulative operating income loss											3 years
Likelihood percentage (in hundredths)			50.00%								50.00%
Valuation allowance			(110,120,000)				(99,594,000)				(110,120,000)	(99,594,000)
Product Warranties [Abstract]
Product warranty description											Generally, sales are accompanied by a 1- to 5-year standard warranty. These warranties cover factors such as non-conformance to specifications and defects in material and workmanship.
Research and Development Costs [Abstract]
Research and development costs											5,600,000	5,700,000	6,600,000
Foreign Currency [Abstract]
Foreign currency loss											4,100,000	600,000	1,100,000
Derivative [Line Items]
Notional amount			7,000,000								7,000,000
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options and warrants exercisable which were not included in computation of diluted earnings per share (in shares)											144,095
Numerator [Abstract]
Net loss from continuing operations			(5,083,000)	1,205,000	5,109,000	(3,285,000)	1,918,000	(8,395,000)	(5,103,000)	(14,755,000)	(2,054,000)	(26,335,000)	(173,375,000)
Net income (loss) from discontinuing operations			(45,000)	(106,000)	186,000	(288,000)	(307,000)	(10,220,000)	(259,000)	(1,192,000)	(253,000)	(11,978,000)	(4,632,000)
NET LOSS			(5,128,000)	1,099,000	5,295,000	(3,573,000)	1,611,000	(18,615,000)	(5,362,000)	(15,947,000)	(2,307,000)	(38,313,000)	(178,007,000)
Denominator [Abstract]
Weighted average shares outstanding - Basic (in shares)											47,708,000	47,548,000	47,378,000
Weighted average shares outstanding - Diluted (in shares)											47,708,000	47,548,000	47,378,000
Basic loss per common share:
Basic loss per share - continuing operations (in dollars per share)			$ (0.10)	$ 0.02	$ 0.11	$ (0.07)	$ 0.04	$ (0.18)	$ (0.11)	$ (0.31)	$ (0.04)	$ (0.56)	$ (3.66)
Basic loss per share - discontinued operations (in dollars per share)			$ 0	$ 0	$ 0	$ (0.01)	$ (0.01)	$ (0.21)	$ 0	$ (0.03)	$ (0.01)	$ (0.25)	$ (0.10)
Basic loss per share (in dollars per share)			$ (0.10)	$ 0.02	$ 0.11	$ (0.08)	$ 0.03	$ (0.39)	$ (0.11)	$ (0.34)	$ (0.05)	$ (0.81)	$ (3.76)
Diluted loss per common share
Diluted loss per common share - continuing operations (in dollars per share)			$ (0.10)	$ 0.02	$ 0.11	$ (0.07)	$ 0.04	$ (0.18)	$ (0.11)	$ (0.31)	$ (0.04)	$ (0.56)	$ (3.66)
Diluted loss per common share - discontinued operations (in dollars per share)			$ 0	$ 0	$ 0	$ (0.01)	$ (0.01)	$ (0.21)	$ 0	$ (0.03)	$ (0.01)	$ (0.25)	$ (0.10)
Diluted loss per share (in dollars per share)			$ (0.10)	$ 0.02	$ 0.11	$ (0.08)	$ 0.03	$ (0.39)	$ (0.11)	$ (0.34)	$ (0.05)	$ (0.81)	$ (3.76)
Stock-Based Compensation [Abstract]
Number of purchase right distributed as dividend			1								1
Shares on exercise of right											one one-hundredth of a share of our Series A Junior Participating Preferred Stock
Junior participating preferred stock purchase price (in dollars per share)			$ 30.00								$ 30.00
Period for exercise of right											10 days
Percentage of beneficial ownership considered for exercise of right (in hundredths)											20.00%
Market price of shares as number of times of purchase price of right											2
Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options and warrants exercisable which were not included in computation of diluted earnings per share (in shares)											0	165,197		2,205,882
Foreign Exchange Forward Contracts [Member]
Derivative [Line Items]
Notional amount			$ 0				$ 0				$ 0	$ 0
Building and Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful lives											15 years
Building and Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful lives											40 years
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful lives											10 years
Internal Use Software [Member]
Property, Plant and Equipment [Line Items]
Useful lives											3 years