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Discontinued Operations - Reconciliation of Carrying Amounts of Major Classes of Current Liabilities of Fiber Optic Licensing Operations (Detail) - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Current liabilities: |  |
Accounts payable and accrued expenses | $ 2,651 | $ 15,313
Total current liabilities of discontinued operations | $ 2,651 | $ 15,313

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