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Note 1 - Organization and Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2021
Notes Tables |
Revenue from External Customers by Products and Services [Table Text Block] |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
Revenue by customers’ geographic locations |  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
North America |  |  | 88 | % |  |  | 84 | % |  |  | 87 | % |  |  | 86 | %
Europe, Middle East, Africa (EMEA) |  |  | 9 | % |  |  | 13 | % |  |  | 10 | % |  |  | 12 | %
Other |  |  | 3 | % |  |  | 3 | % |  |  | 3 | % |  |  | 2 | %
Total revenue |  |  | 100 | % |  |  | 100 | % |  |  | 100 | % |  |  | 100 | %

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- Definition Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599 + Details
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