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Note 8 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | --- | ---
Net operating loss carryforwards | $ 27,500 | $ 12,314 |  |
Stock-based compensation | 2,066 | 1,678 |  |
Accruals and reserves | 2,902 | 427 |  |
Inventory | 236 | 142 |  |
Lease liabilities | 4,198 | 2,247 |  |
Tax credit carryforward | 594 | 225 |  |
Other | 318 | 48 |  |
Total deferred tax assets | 37,814 | 17,081 |  |
Intangibles | (35,241) | (5,025) |  |
Right-of-use assets | (4,070) | (2,261) |  |
Fair value change in investments | (294) | (287) |  |
Fixed assets | (1,203) | (959) |  |
Other | 0 | (51) |  |
Total deferred tax liabilities | (40,808) | (8,583) |  |
Net deferred tax (liabilities) assets before valuation allowance | (2,994) | 8,498 |  |
Less: valuation allowance | (2,493) | (8,498) | $ (8,706) | $ (8,345)
Net deferred tax liabilities | $ (5,487) | $ 0 |  |

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