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Note 8 - Commitments and Contingencies (Details Textual) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Long-term Purchase Commitment, Amount | $ 1,247,000 |  |
Unrecognized Tax Benefits, Ending Balance | 679,000 | $ 652,000 | $ 1,189,000
Other Accrued Liabilities, Noncurrent | 0 | 152,000 |
Litigation for Intellectual Property Infringement [Member] |  |  |
Litigation Settlement, Expense | 0 | 1,111,000 |
Litigation Settlement, Expense Capitalized | $ 4,698,000 | $ 2,289,000 |

X
- Definition Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees, capitalized during the period. + References No definition available. + Details
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X
- Definition Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees. + References No definition available. + Details
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X
- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
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X
- Definition Amount of expenses incurred but not yet paid classified as other, due after one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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X
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X
- Details
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