Segment Data and Related Information (Statement of Operations Data) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Operating income (loss)	$ (2,240)	$ 2,846
Fiber Optics
Segment Reporting Information [Line Items]
Operating income (loss)	(6,571)	(395)
Photovoltaics
Segment Reporting Information [Line Items]
Operating income (loss)	$ 4,331	$ 3,241