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Note 3 - STRATEGIC PARTNERSHIP AGREEMENT WITH ADVANTEST AND RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jul. 29, 2020 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Revenue from Contract with Customer, Including Assessed Tax |  | $ 34,668 | $ 27,419 | $ 68,166 | $ 51,619 |
Strategic Partnership for Joint Development and Sales Technology Solutions [Member] |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | 3,306,924 |  |  |  |  |
Proceeds from Issuance of Common Stock | $ 65,200 |  |  |  |  |
Amendment #1 to Software License & Related Services Agreement [Member] |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 2,600 | $ 2,600 | 5,300 | $ 5,200 |
Related Party Transaction, Due from (to) Related Party, Total |  | 0 |  | 0 |  | $ 0
Contract with Customer, Liability, Total |  | $ 1,600 |  | $ 1,600 |  | $ 6,800

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