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Gain on Sale of Patent Assets (Detail Textuals) (USD $)
3 Months Ended 9 Months Ended 3 Months Ended
Sep. 30, 2012
Sep. 30, 2012
Jun. 30, 2012
Wireless patent
Sep. 30, 2012
DSL patent
Finite-Lived Intangible Assets [Line Items]        
Gain on sale of patent assets $ 15,167,000 $ 86,394,000 $ 71,200,000 $ 15,200,000
Sale of patent     75,000,000 16,000,000
Transaction cost     $ 3,800,000 $ 800,000