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Note 1 - Organization and Significant Accounting Policies - Concentrations Risk by Geographic Locations (Details) - Revenue Benchmark [Member] - Geographic Concentration Risk [Member] | 3 Months Ended | 9 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
UNITED STATES |  |  |  |
Revenue by customers' geographic locations, percentage | 69.00% | 82.00% | 74.00% | 80.00%
EMEA [Member] |  |  |  |
Revenue by customers' geographic locations, percentage | 20.00% | 9.00% | 18.00% | 10.00%
CANADA |  |  |  |
Revenue by customers' geographic locations, percentage | 8.00% | 6.00% | 5.00% | 7.00%
Geographic, Other [Member] |  |  |  |
Revenue by customers' geographic locations, percentage | 3.00% | 3.00% | 3.00% | 3.00%
All Location [Member] |  |  |  |
Revenue by customers' geographic locations, percentage | 100.00% | 100.00% | 100.00% | 100.00%

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