Intangible Assets

12 Months Ended

Dec. 31, 2012

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

10. Intangible Assets

Intangible assets, consisting of acquired technology and customer relationships related to the Cellex and General Hydrogen acquisitions during the year ended December 31, 2007 are amortized using a straight-line method over their useful lives of eight years. On January 1, 2008, General Hydrogen (Canada) Corporation, Plug Power Canada Inc. and Cellex Power Products, Inc. amalgamated as Plug Power Canada Inc. 

The gross carrying amount and accumulated amortization of the Company’s acquired identifiable intangible assets as of December 31, 2012 are as follows:

							Effect of
	Weighted Average	Gross Carrying			Accumulated		Foreign Currency
	Amortization Period	Amount			Amortization		Translation		Total
Acquired Technology	8 years		$	15,900,000	$	(12,156,049)	$	1,234,953	$	4,978,904
Customer Relationships	8 years		1,000,000		(708,333)		-		291,667
			$	16,900,000	$	(12,864,382)	$	1,234,953	$	5,270,571

The gross carrying amount and accumulated amortization of the Company’s acquired identifiable intangible assets as of December 31, 2011 are as follows: 

							Effect of
	Weighted Average	Gross Carrying			Accumulated		Foreign Currency
	Amortization Period	Amount			Amortization		Translation		Total
Acquired Technology	8 years		$	15,900,000	$	(9,974,597)	$	1,132,529	$	7,057,932
Customer Relationships	8 years		1,000,000		(583,296)		-		416,704
			$	16,900,000	$	(10,557,893)	$	1,132,529	$	7,474,636

Amortization expense for acquired identifiable intangible assets for the years ended December 31, 2012, 2011, and 2010 was $2.3 million, $2.3 million, and $2.3 million, respectively. Estimated amortization expense for subsequent years is as follows:

2013	$	2,310,532
2014	2,310,532
2015	649,507
Total	$	5,270,571