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Note O - Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2023
Notes Tables |
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] |
|  | Years ended December 31, |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Domestic |  | $ | (52,886 | ) |  | $ | (45,404 | ) |  | $ | (21,229 | )
Foreign |  |  | (3,153 | ) |  |  | (20,992 | ) |  |  | (32,931 | )
Total loss before income taxes |  | $ | (56,039 | ) |  | $ | (66,396 | ) |  | $ | (54,160 | )
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
Current: |  | 2023 |  |  | 2022 |  |  | 2021 |
Federal |  | $ | — |  |  | $ | — |  |  | $ | — |
State |  |  | 1 |  |  |  | 1 |  |  |  | 2 |
Foreign |  |  | 8 |  |  |  | — |  |  |  | — |
Total |  | $ | 9 |  |  | $ | 1 |  |  | $ | 2 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | — |  |  | $ | — |  |  | $ | — |
State |  |  | — |  |  |  | — |  |  |  | — |
Foreign |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | — |  |  | $ | — |  |  | $ | — |
Income tax (benefit) expense |  | $ | 9 |  |  | $ | 1 |  |  | $ | 2 |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
|  | 2023 |  |  | 2022 |
NOL carryforward |  | $ | 49,469 |  |  | $ | 47,901 |
Inventory reserves |  |  | 3,195 |  |  |  | 2,892 |
Unrealized gains and losses |  |  | 355 |  |  |  | 363 |
Share-based compensation |  |  | 1,013 |  |  |  | 914 |
Foreign tax credit |  |  | 4,599 |  |  |  | 4,599 |
Research and development credits |  |  | 10,998 |  |  |  | 10,505 |
Capitalized research and development |  |  | 8,717 |  |  |  |  |
Interest |  |  | 5,659 |  |  |  | 3,966 |
ASC 842 Assets |  |  | 1,561 |  |  |  | 1,602 |
Other |  |  | 941 |  |  |  | 776 |
Deferred tax assets |  |  | 86,507 |  |  |  | 73,518 |
Less valuation allowance |  |  | (78,124 | ) |  |  | (69,680 | )
Deferred tax assets, net |  |  | 8,383 |  |  |  | 3,838 |
Depreciation and amortization |  |  | (6,992 | ) |  |  | (2,441 | )
ASC 842 Liabilities |  |  | (1,391 | ) |  |  | (1,397 | )
Deferred tax liabilities |  |  | (8,383 | ) |  |  | (3,838 | )
Deferred tax assets, net |  | $ | — |  |  | $ | — |
Summary of Valuation Allowance [Table Text Block] |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Beginning Balance, January 1 |  | $ | 69,680 |  |  | $ | 57,721 |  |  | $ | 43,462 |
Change charged to expense/(income) |  |  | 8,755 |  |  |  | 14,196 |  |  |  | 13,822 |
Change charged to currency translation adjustment |  |  | (311 | ) |  |  | (2,237 | ) |  |  | 437 |
Ending Balance, December 31 |  | $ | 78,124 |  |  | $ | 69,680 |  |  | $ | 57,721 |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Expected taxes at statutory rate |  | $ | (11,768 | ) |  | $ | (13,943 | ) |  | $ | (11,374 | )
PPP loan forgiveness |  |  | — |  |  |  | — |  |  |  | (1,308 | )
Non-deductible/non-taxable items |  |  | 57 |  |  |  | 33 |  |  |  | 897 |
Global intangible low-taxed incom |  |  | 2,568 |  |  |  |  |  |  |  |  |
Foreign rate differences |  |  | 242 |  |  |  | 552 |  |  |  | 107 |
Foreign permanent differences |  |  | (1,212 | ) |  |  | (1,407 | ) |  |  | (1,320 | )
Changes in valuation allowance |  |  | 8,755 |  |  |  | 14,196 |  |  |  | 13,822 |
Share-based compensation |  |  | 729 |  |  |  | 879 |  |  |  | 468 |
Research and development credits |  |  | (492 | ) |  |  | (626 | ) |  |  | (872 | )
Extinguishment of debt |  |  | 1,580 |  |  |  | — |  |  |  | — |
Foreign other |  |  | — |  |  |  | — |  |  |  | — |
Other, net |  |  | (450 | ) |  |  | 317 |  |  |  | (418 | )
Tax (benefit) expense |  | $ | 9 |  |  | $ | 1 |  |  | $ | 2 |
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] |
|  | 2023 |  |  | 2022 |  |  | 2021 |
Unrecognized tax benefits — January 1 |  | $ | 181 |  |  | $ | 181 |  |  | $ | 181 |
Gross increases — tax positions in prior period |  |  | — |  |  |  | — |  |  |  | — |
Gross decreases — tax positions in prior period |  |  | — |  |  |  | — |  |  |  | — |
Unrecognized tax benefits — December 31 |  | $ | 181 |  |  | $ | 181 |  |  | $ | 181 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 9 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-9 + Details
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