Segment, Customer and Geographical Reporting (Details Textual)	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Entity-Wide Revenue, Major Customer, Percentage	61.00%	72.00%	63.00%	76.00%
Concentration Risk, Percentage	100.00%	100.00%	100.00%	100.00%
Optics [Member] | Maximum [Member]
Entity-Wide Revenue, Major Customer, Percentage	10.00%	10.00%	10.00%	10.00%
Customer Concentration Risk [Member]
Concentration Risk, Percentage	30.00%	32.00%	32.00%	29.00%
Sales Revenue, Segment [Member]
Concentration Risk, Percentage	100.00%	100.00%	100.00%	100.00%