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Note 6 - Revenue From Contracts With Customers - Disaggregation of Revenues (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Revenue | $ 30,941 | $ 30,771 | $ 95,418 | $ 84,423
Semiconductor Market [Member] |  |  |  |
Revenue | 18,476 | 19,170 | 54,992 | 48,969
Industrial Market [Member] |  |  |  |
Revenue | 2,456 | 2,130 | 8,399 | 7,859
Automotive [Member] |  |  |  |
Revenue | 1,775 | 1,621 | 5,914 | 7,971
Life Sciences [Member] |  |  |  |
Revenue | 1,330 | 1,715 | 3,978 | 3,583
Defense/ Aerospace [Member] |  |  |  |
Revenue | 3,392 | 1,914 | 10,121 | 4,830
Security [Member] |  |  |  |
Revenue | 967 | 871 | 2,869 | 2,239
Other Multi Markets [Member] |  |  |  |
Revenue | 2,545 | 3,350 | 9,145 | 8,972
Thermal Testing Products [Member] |  |  |  |
Revenue | 4,742 | 5,836 | 16,734 | 16,844
Thermal Process [Member] |  |  |  |
Revenue | 11,518 | 11,026 | 33,212 | 27,990
Semiconductor Production Test Products [Member] |  |  |  |
Revenue | 8,573 | 7,770 | 25,432 | 20,409
Video Imaging [Member] |  |  |  |
Revenue | 1,945 | 2,447 | 7,027 | 6,692
Flying Probe and In-circuit Testers [Member] |  |  |  |
Revenue | 2,012 | 1,605 | 4,588 | 5,359
Service and Other Products [Member] |  |  |  |
Revenue | 2,151 | 2,087 | 8,425 | 7,129
End User [Member] |  |  |  |
Revenue | 21,139 | 21,548 | 64,720 | 60,785
OEM and Integrators [Member] |  |  |  |
Revenue | $ 9,802 | $ 9,223 | $ 30,698 | $ 23,638

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- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 924 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479941/924-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-5 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 30 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-30 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-42 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-40 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-41 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-4 + Details
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