v3.23.2

Note 19 - Income Taxes - Net Deferred Tax Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Accruals and other | $ 1,738 | $ 3,989
Research credits | 7,392 | 7,275
Net operating loss carryforward | 84,325 | 75,452
Section 59(e) R&D expenditures | 3,496 | 5,070
Section 174 R&D expenditures | 981 | 0
Deferred revenue | 0 | 19,666
Total deferred tax assets | 97,932 | 111,452
Valuation allowance | (97,932) | (111,452)
Net deferred tax assets | $ 0 | $ 0

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