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Note 14 - Composition of Certain Financial Statement Caption (Details Textual) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Estimated Litigation Liability, Current | [1] | $ 126.5 | $ 128.4
Xactware Solutions, Inc. Patent Litigation [Member] |  |  |
Estimated Litigation Liability, Current |  | $ 125.0 |
[1] | Included a litigation reserve for Xactware Solutions, Inc. Patent Litigation of $125.0 million.

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- Definition Carrying amount of reserve for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs, which is expected to be paid within one year of the date of the statement of financial position. + 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 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 55 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=116646759&loc=d3e15243-108350 Reference 3: 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=121557415&loc=d3e14326-108349 + Details
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Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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