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Description of Business (Sale of Fiber Optics-related Assets) (Details) (USD $)
3 Months Ended 0 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Sep. 30, 2013
May 07, 2012
Sumitomo Electric Industries, LTD
Dec. 31, 2013
Sumitomo Electric Industries, LTD
Sep. 30, 2013
Sumitomo Electric Industries, LTD
Dec. 31, 2013
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    
Deferred gain associated with sale of assets 3,400,000   0       3,400,000
Reduction of purchase price           1,100,000  
Additional gain recognized from sale           400,000  
Fees billed under transition services agreement $ 700,000 $ 700,000