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Summary of Significant Accounting Policies (Details Textual) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended		9 Months Ended					9 Months Ended
	Sep. 30, 2012 NumberOfCustomers	Sep. 30, 2011	Sep. 30, 2012 NumberOfCustomers	Sep. 30, 2011	Dec. 31, 2011 NumberOfCustomers	Aug. 31, 2009 2009 Unit Offering [Member] Warrant [Member]	Nov. 30, 2010 2010 Unit Offering [Member] Warrant [Member]	Sep. 30, 2012 Maximum [Member]	Sep. 30, 2012 Minimum [Member]	Dec. 31, 2011 Minimum [Member]
Summary of Significant Accounting Policies (Textual) [Abstract]
Immaterial prior period adjustments to cost of product revenue		$ 100,000		$ 300,000
Deferred revenue	716,000		716,000		111,000
Number of major customers representing outstanding trade receivables	3		3		2
Cumulative outstanding trade receivables percentage by major customers	69.00%		69.00%		58.00%				10.00%	10.00%
Inventory valuation reserves	300,000		300,000		600,000
Unsalable product having offsetting warranty claim	1,100,000		1,100,000
Estimated useful life of property and equipment								5 years	3 years
Estimated useful life of intangible assets			10 years
Impairment charges on long-lived assets	0	0	0	0
Foreign currency gains (losses)	206,000	(41,000)	(212,000)	394,000
Warrants to purchase an aggregate shares of common stock						2.4	3.7
Derecognition of tax positions, Maximum								50.00%
Company's tax years subject to examination by the taxing jurisdictions								2011	2007
Product warranty liability	70,000		70,000		0
Product warranty receivable current	$ 1,700,000		$ 1,700,000
Life of inventory			2 years
Protracted length of inventory			P1Y
Period of warranty			1 year

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