Investments	3 Months Ended
Mar. 31, 2013
Investments, All Other Investments [Abstract]
Strategic Investments	Investments We hold ownership interests in certain unconsolidated businesses that are accounted for under the equity or cost methods of accounting. These interests include Asola Solar Power GmbH and its affiliate Asola Quantum Solarpower AG (referred to collectively as “Asola”), Shigan Quantum Technologies PVT LTD (Shigan Quantum) and Fisker Automotive, Inc. (Fisker Automotive). Investment in Affiliates We account for our affiliates, Asola, PCD, and Shigan Quantum, under the equity method of accounting. Our investment in Asola and PCD was zero as of December 31, 2012 and March 31, 2013. Our investment in Shigan-Quantum was $5,998 and zero as of December 31, 2012 and March 31, 2013, respectively. Asola On January 4, 2008, we acquired a 24.9% ownership interest in Asola, a solar module manufacturer located in Erfurt, Germany. We account for our equity interest in Asola under the equity method of accounting. As of December 31, 2012, we had recognized impairment charges to write down the entire carrying balance of our investments in and advances and prepayments to Asola due to declining prospects for Asola's business. On January 23, 2013, Asola filed an application for self-administered insolvency under German law, which the local court granted on January 29, 2013. We did not recognize any activity in the first three months of 2013 as we have no obligation to fund deficit balances of the business and as a result, the carrying amount of our investment remained at zero. Shigan Quantum On September 3, 2009, we acquired a 25% interest in Shigan Quantum, a start-up company organized under India's Corporate Act, in exchange for giving Shigan Quantum certain rights to our gas injector intellectual property. Shigan Quantum intends to manufacture and sell gaseous fuel injectors using our technologies and variants thereof. We account for our equity interest in Shigan Quantum under the equity method of accounting. Our equity share in losses associated with Shigan Quantum during the first quarter of 2013 exceeded the carrying balance of our investment as of December 31, 2012 of $5,998 and we have no obligation to fund deficit balances of the business. Accordingly, we recognized losses during the three month period ended March 31, 2013 to the extent that the carrying balance was reduced to zero. Fisker Automotive On August 7, 2007, we and Fisker Coachbuild, LLC, launched Fisker Automotive, for the purpose of designing and producing premium plug-in hybrid automobiles. We initially owned 62.0% of Fisker Automotive; however, Fisker Automotive raised a level of capital that resulted in the dilution of our direct ownership interest to less than 1%. Fisker Automotive's business prospects have significantly declined in recent months and it has been reported that Fisker Automotive's vehicle production ceased in July 2012 and has not yet resumed. Our investment in Fisker Automotive, which we account for under the cost method, was zero as of December 31, 2012 and March 31, 2013.

Investments

We hold ownership interests in certain unconsolidated businesses that are accounted for under the equity or cost methods of accounting. These interests include Asola Solar Power GmbH and its affiliate Asola Quantum Solarpower AG (referred to collectively as “Asola”), Shigan Quantum Technologies PVT LTD (Shigan Quantum) and Fisker Automotive, Inc. (Fisker Automotive).

Investment in Affiliates

We account for our affiliates, Asola, PCD, and Shigan Quantum, under the equity method of accounting. Our investment in Asola and PCD was zero as of December 31, 2012 and March 31, 2013. Our investment in Shigan-Quantum was $5,998 and zero as of December 31, 2012 and March 31, 2013, respectively.

Asola

On January 4, 2008, we acquired a 24.9% ownership interest in Asola, a solar module manufacturer located in Erfurt, Germany. We account for our equity interest in Asola under the equity method of accounting. As of December 31, 2012, we had recognized impairment charges to write down the entire carrying balance of our investments in and advances and prepayments to Asola due to declining prospects for Asola's business. On January 23, 2013, Asola filed an application for self-administered insolvency under German law, which the local court granted on January 29, 2013. We did not recognize any activity in the first three months of 2013 as we have no obligation to fund deficit balances of the business and as a result, the carrying amount of our investment remained at zero.

Shigan Quantum

On September 3, 2009, we acquired a 25% interest in Shigan Quantum, a start-up company organized under India's Corporate Act, in exchange for giving Shigan Quantum certain rights to our gas injector intellectual property. Shigan Quantum intends to manufacture and sell gaseous fuel injectors using our technologies and variants thereof. We account for our equity interest in Shigan Quantum under the equity method of accounting. Our equity share in losses associated with Shigan Quantum during the first quarter of 2013 exceeded the carrying balance of our investment as of December 31, 2012 of $5,998 and we have no obligation to fund deficit balances of the business. Accordingly, we recognized losses during the three month period ended March 31, 2013 to the extent that the carrying balance was reduced to zero.

Fisker Automotive

On August 7, 2007, we and Fisker Coachbuild, LLC, launched Fisker Automotive, for the purpose of designing and producing premium plug-in hybrid automobiles. We initially owned 62.0% of Fisker Automotive; however, Fisker Automotive raised a level of capital that resulted in the dilution of our direct ownership interest to less than 1%. Fisker Automotive's business prospects have significantly declined in recent months and it has been reported that Fisker Automotive's vehicle production ceased in July 2012 and has not yet resumed. Our investment in Fisker Automotive, which we account for under the cost method, was zero as of December 31, 2012 and March 31, 2013.