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Note 2 - Summary of Significant Accounting Policies - Concentrations (Details) - Customer Concentration Risk - customer | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Revenue Benchmark |  |  |
Concentrations |  |  |
Number of Major Customers | 2 | 3 | 3
Revenue Benchmark | Customer A | North America |  |  |
Concentrations |  |  |
Concentration Risk, Percentage | 58.00% |  |
Revenue Benchmark | Customer B | North America |  |  |
Concentrations |  |  |
Concentration Risk, Percentage |  | 51.00% |
Revenue Benchmark | Customer C | North America |  |  |
Concentrations |  |  |
Concentration Risk, Percentage |  |  | 71.00%
Revenue Benchmark | Total Customer Base |  |  |
Concentrations |  |  |
Concentration Risk, Percentage | 38.00% | 58.00% | 70.00%
Accounts Receivable. | Total Customer Base |  |  |
Concentrations |  |  |
Concentration Risk, Percentage | 32.00% | 58.00% |

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13537-108611 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI https://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
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