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Note 10 - Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
|  | 2022 |  |  | 2021 |
Current: |  |  |  |  |  |  |  |
Federal |  | $ | 1 |  |  | $ | 15 |
State |  |  | 3 |  |  |  | 13 |
Total current tax provision |  |  | 4 |  |  |  | 28 |
Deferred: |  |  |  |  |  |  |  |
Federal |  |  | - |  |  |  | - |
State |  |  | - |  |  |  | - |
Total deferred tax provision |  |  | - |  |  |  | - |
Income tax expense |  | $ | 4 |  |  | $ | 28 |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
|  | 2022 |  |  | 2021 |
Expected provision at federal statutory tax rate at 21% |  | $ | (46 | ) |  | $ | 1,003 |
PPP loan forgiveness |  |  | - |  |  |  | (513 | )
Decrease in valuation allowance |  |  | (33 | ) |  |  | (346 | )
State and local taxes |  |  | 84 |  |  |  | 6 |
Foreign tax rate differential |  |  | 4 |  |  |  | (116 | )
US taxation of foreign operations |  |  | 80 |  |  |  | - |
Federal research and development credits |  |  | (55 | ) |  |  | (57 | )
Change in tax rates |  |  | 10 |  |  |  | - |
Non-deductible expenses |  |  | 62 |  |  |  | 51 |
Other |  |  | (102 | ) |  |  | - |
Income tax expense |  | $ | 4 |  |  | $ | 28 |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
|  | 2022 |  |  | 2021 |
Deferred income tax assets: |  |  |  |  |  |  |  |
Net operating loss carryforwards |  | $ | 482 |  |  | $ | 808 |
R&D tax credit carryforwards |  |  | 1,723 |  |  |  | 1,672 |
Impairment charges |  |  | - |  |  |  | 723 |
Compensation costs |  |  | 10 |  |  |  | 149 |
Vacation accrual |  |  | 174 |  |  |  | 141 |
Intangible assets |  |  | 27 |  |  |  | - |
Capitalized research and development |  |  | 356 |  |  |  | - |
Other items |  |  | 263 |  |  |  | 114 |
Deferred income tax assets |  |  | 3,035 |  |  |  | 3,607 |
Less: valuation allowance |  |  | (2,957 | ) |  |  | (2,990 | )
Deferred income tax assets, net of valuation allowance |  |  | 78 |  |  |  | 617 |
Deferred incomes tax liability: |  |  |  |  |  |  |  |
Property, plant and equipment |  |  | (11 | ) |  |  | (617 | )
Prepaid expenses |  |  | (67 | ) |  |  | - |
Deferred income tax asset, net |  | $ | - |  |  | $ | - |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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