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Agreement with SK hynix (Details) - USD ($) $ in Millions |  |  |  | 1 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 18, 2015 | Dec. 09, 2013 | Jun. 11, 2013 | May 31, 2013 | Dec. 31, 2016 | Jun. 30, 2015
SK hynix |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Term of patent license agreement | 6 years |  | 5 years |  |  |
License Agreement, Average Amount to be Paid Quarterly |  |  |  |  |  | $ 12.0
Future Receivables |  |  |  |  |  | 432.0
Credit against settlement award |  |  |  | $ 250.0 |  |
Micron |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Term of patent license agreement |  | 7 years |  |  |  |
Amount to be paid quarterly |  |  |  |  | $ 10.0 |
Future Receivables |  |  |  |  | $ 154.5 |
Maximum [Member] | SK hynix |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amount to be paid quarterly |  |  |  |  |  | 16.0
Minimum [Member] | SK hynix |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Amount to be paid quarterly |  |  |  |  |  | $ 8.0

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