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Note 11 - Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
|  | 2022 |  |  | 2021 |
|  | (in thousands) |
Federal income tax expense (benefit) at statutory rate |  | $ | 375 |  |  | $ | (718 | )
Adjusted for: |  |  |  |  |  |  |  |
Permanent differences |  |  | 86 |  |  |  | 102 |
Valuation allowance |  |  | (461 | ) |  |  | 616 |
Income tax expense (benefit) |  | $ | - |  |  | $ | - |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
|  | 2022 |  |  | 2021 |
|  | (in thousands) |
Net operating loss and tax credit carryforwards |  | $ | 23,980 |  |  | $ | 25,132 |
Joint venture and other investments |  |  | (27 | ) |  |  | (27 | )
Accrued retirement benefits |  |  | 1,149 |  |  |  | 2,545 |
Property net book value |  |  | 2,960 |  |  |  | 2,862 |
Deferred revenue |  |  | 1,016 |  |  |  | 1,083 |
Reserves and other |  |  | (50 | ) |  |  | (5 | )
Total deferred tax assets |  |  | 29,028 |  |  |  | 31,590 |
Valuation allowance |  |  | (29,028 | ) |  |  | (31,590 | )
Net deferred tax assets |  | $ | - |  |  | $ | - |

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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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