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Contingencies - Litigation (Details) | Sep. 14, 2018 number_patents Petition | Feb. 28, 2018 number_patents | Sep. 15, 2017 number_patents | Mar. 08, 2017 number_patents | Feb. 24, 2017 number_patents | Aug. 25, 2016 number_patents | Jun. 06, 2016 number_patents | Jun. 30, 2019 USD ($)
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Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Loss contingencies, patents allegedly infringed, number of inter partes review requested | Petition | 2 |  |  |  |  |  |  |
Loss contingency accrual | $ |  |  |  |  |  |  |  | $ 0
AgaMatrix |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Loss contingency, patents allegedly infringed, number |  |  |  |  |  |  | 3 |
Loss contingencies, patents allegedly infringed, number of inter partes review requested | 2 |  |  |  |  |  |  |
WaveForm Technologies, Inc. |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Loss contingency, patents allegedly infringed, number transferred to new plaintiff |  |  |  |  | 3 |  |  |
Loss contingencies, patents allegedly infringed, number of inter partes review requested |  | 2 |  | 3 |  | 2 |  |
AgaMatrix |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Gain contingency, patents allegedly infringed upon, number |  |  | 2 |  |  |  |  |

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- Definition Amount of loss contingency liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349 + Details
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