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Note 1 - Organization and Significant Accounting Policies - Property and Equipment (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Total cost | $ 24,042 | $ 23,242
Less accumulated depreciation | (18,958) | (18,703)
Total net book value | 5,084 | 4,539
Land [Member] |  |
Total cost | 1,050 | 1,050
Building [Member] |  |
Total cost | $ 3,950 | 3,950
Depreciable Life (Year) | 39 years |
Building and Leasehold Improvements [Member] |  |
Total cost | $ 2,677 | 2,655
Building and Leasehold Improvements [Member] | Minimum [Member] |  |
Depreciable Life (Year) | 3 years |
Building and Leasehold Improvements [Member] | Maximum [Member] |  |
Depreciable Life (Year) | 39 years |
Field Equipment [Member] |  |
Total cost | $ 13,004 | 12,100
Field Equipment [Member] | Minimum [Member] |  |
Depreciable Life (Year) | 3 years |
Field Equipment [Member] | Maximum [Member] |  |
Depreciable Life (Year) | 4 years |
Computer Equipment and Software [Member] |  |
Total cost | $ 2,017 | 2,049
Computer Equipment and Software [Member] | Minimum [Member] |  |
Depreciable Life (Year) | 2 years |
Computer Equipment and Software [Member] | Maximum [Member] |  |
Depreciable Life (Year) | 3 years |
Furniture and Fixtures [Member] |  |
Total cost | $ 1,305 | 1,307
Furniture and Fixtures [Member] | Minimum [Member] |  |
Depreciable Life (Year) | 3 years |
Furniture and Fixtures [Member] | Maximum [Member] |  |
Depreciable Life (Year) | 10 years |
Vehicles [Member] |  |
Total cost | $ 37 | 32
Depreciable Life (Year) | 5 years |
Construction in Progress [Member] |  |
Total cost | $ 2 | $ 99

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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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