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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
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Mar. 31, 2022 | Mar. 31, 2021
UNITED STATES |  |
United States | 79.00% | 75.00%
CANADA |  |
United States | 1.00% | 10.00%
EMEA [Member] |  |
United States | 16.00% | 12.00%
Geographic, Other [Member] |  |
United States | 4.00% | 3.00%
All Location [Member] |  |
United States | 100.00% | 100.00%

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