Description of Business (Sale of Fiber Optics-related Assets) (Details) (USD $)	3 Months Ended		9 Months Ended			0 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2013	May 07, 2012 Sumitomo Electric Industries, LTD	Jun. 30, 2014 Sumitomo Electric Industries, LTD	Sep. 30, 2013 Sumitomo Electric Industries, LTD	Jun. 30, 2014 Indemnification Obligation Sumitomo Electric Industries, LTD
Footnote disclosures:
Gain on sale of assets						$ 2,800,000
Indemnification associated with sale of assets (up to $3.4 million)							3,400,000	3,400,000
Indemnification period							2 years
Proceeds from sale of assets							13,100,000
Cash held in escrow								2,600,000
Escrow, payout period (in years)							2 years
Reduction of purchase price								1,100,000
Additional gain recognized from sale								400,000
Deferred gain associated with sale of assets	3,400,000		3,400,000		0				3,400,000
Fees billed under transition services agreement	$ 700,000	$ 800,000	$ 2,500,000	$ 2,100,000