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v3.22.1

Note 1 - Organization and Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2022
Notes Tables |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] |
|  | Accounts Receivable |  |  | Revenue |
|  | March 31, |  |  | December 31, |  |  | March 31, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Customer A |  |  | 16 | % |  |  | 10 | % |  |  | * |  |  |  | * |
Customer B |  |  | 14 | % |  |  | * |  |  |  | 20 | % |  |  | * |
Customer C |  |  | * |  |  |  | * |  |  |  | 11 | % |  |  | * |
Revenue from External Customers by Products and Services [Table Text Block] |
|  | Three Months Ended |
|  | March 31, |
Revenue by customers’ geographic locations |  | 2022 |  |  | 2021 |
United States |  |  | 79 | % |  |  | 75 | %
Canada |  |  | 1 | % |  |  | 10 | %
Europe, Middle East, Africa (EMEA) |  |  | 16 | % |  |  | 12 | %
Other |  |  | 4 | % |  |  | 3 | %
Total revenue |  |  | 100 | % |  |  | 100 | %

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