Goodwill	12 Months Ended
Sep. 30, 2013
Goodwill [Abstract]
Goodwill	Goodwill Impairment Testing - Fiscal 2011: We performed our annual goodwill impairment test as of December 31, 2010 and based on this analysis, we determined that goodwill related to our Photovoltaics reporting unit was not impaired. During the fourth quarter of fiscal 2011, we changed our method of applying an accounting principle whereby the annual impairment test of goodwill will be performed as of the last day of the Company's fiscal year instead of at December 31^st of each fiscal year. The revised date better aligns with our strategic planning and budgeting process, which is an integral component of the impairment testing, and provides additional time for us to quantify the fair value of our reporting unit. Accordingly, we believe the change in the annual impairment testing date was preferable in the circumstances. The change in the annual goodwill impairment testing date was not intended to nor did it delay, accelerate, or avoid an impairment charge. This change did not result in adjustments to our consolidated financial statements when applied retrospectively. As of September 30, 2011, we performed an annual goodwill impairment test and reviewed the qualitative factors as described in ASU No. 2011-08. We determined that it was not more likely than not that the fair value of our Photovoltaics reporting unit was less than its carrying amount. Impairment Testing - Fiscal 2012: As of September 30, 2012, we performed an annual goodwill impairment test and reviewed the qualitative factors as described in ASU No. 2011-08. We determined that it was not more likely than not that the fair value of our Photovoltaics reporting unit was less than its carrying amount. Impairment Testing - Fiscal 2013: As of September 30, 2013, we performed an annual goodwill impairment test and reviewed the qualitative factors as described in ASU No. 2011-08. Due to the length of time that has elapsed and changes in the underlying assumptions used in our prior quantitative impairment test, we determined to skip the qualitative assessment and perform a quantitative, step one, assessment of possible impairment based on the estimated fair value of the reporting unit. We determined based on that analysis that goodwill related to our photovoltaics reporting unit was not impaired. We will continue to monitor any changes in circumstances or triggering events that might indicate impairment of our goodwill. If there is significant erosion of the Company's market capitalization or if we determine that our Photovoltaics reporting unit is unable to achieve its projected cash flows, we may be required to perform interim period impairment tests. The outcome of these additional tests may result in the recording of goodwill impairment charges.

Goodwill

Impairment Testing - Fiscal 2011:

We performed our annual goodwill impairment test as of December 31, 2010 and based on this analysis, we determined that goodwill related to our Photovoltaics reporting unit was not impaired.

During the fourth quarter of fiscal 2011, we changed our method of applying an accounting principle whereby the annual impairment test of goodwill will be performed as of the last day of the Company's fiscal year instead of at December 31^st of each fiscal year. The revised date better aligns with our strategic planning and budgeting process, which is an integral component of the impairment testing, and provides additional time for us to quantify the fair value of our reporting unit. Accordingly, we believe the change in the annual impairment testing date was preferable in the circumstances. The change in the annual goodwill impairment testing date was not intended to nor did it delay, accelerate, or avoid an impairment charge. This change did not result in adjustments to our consolidated financial statements when applied retrospectively.

As of September 30, 2011, we performed an annual goodwill impairment test and reviewed the qualitative factors as described in ASU No. 2011-08. We determined that it was not more likely than not that the fair value of our Photovoltaics reporting unit was less than its carrying amount.

Impairment Testing - Fiscal 2012:

As of September 30, 2012, we performed an annual goodwill impairment test and reviewed the qualitative factors as described in ASU No. 2011-08. We determined that it was not more likely than not that the fair value of our Photovoltaics reporting unit was less than its carrying amount.

Impairment Testing - Fiscal 2013:

As of September 30, 2013, we performed an annual goodwill impairment test and reviewed the qualitative factors as described in ASU No. 2011-08. Due to the length of time that has elapsed and changes in the underlying assumptions used in our prior quantitative impairment test, we determined to skip the qualitative assessment and perform a quantitative, step one, assessment of possible impairment based on the estimated fair value of the reporting unit. We determined based on that analysis that goodwill related to our photovoltaics reporting unit was not impaired. We will continue to monitor any changes in circumstances or triggering events that might indicate impairment of our goodwill. If there is significant erosion of the Company's market capitalization or if we determine that our Photovoltaics reporting unit is unable to achieve its projected cash flows, we may be required to perform interim period impairment tests. The outcome of these additional tests may result in the recording of goodwill impairment charges.