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Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions | 1 Months Ended |
--- | --- | ---
Jun. 30, 2013 | Dec. 31, 2015
Equity Financing Agreement [Member] |  |
Number of shares issued as consideration |  | 329,131
Right to sell of common stock | $ 30.0 |
Acquired Patent Portfolio [Member] |  |
Number of shares issued as consideration |  | 139,548

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