Segment Data and Related Information (Statement of Operations Data) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting Information [Line Items]
Operating income (loss)	$ (7,669)	$ (8,758)	$ 7,348	$ (29,332)
Fiber Optics
Segment Reporting Information [Line Items]
Operating income (loss)	(8,998)	(3,840)	(1,501)	(22,284)
Photovoltaics
Segment Reporting Information [Line Items]
Operating income (loss)	$ 1,329	$ (4,918)	$ 8,849	$ (7,048)