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Note 4 - Property and Equipment and Building Construction in Progress - Property and Equipment, Net (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Accumulated depreciation | $ (15,731) | $ (13,111)
Property, Plant and Equipment, Including Building Construction in Process | 28,308 | 27,336
Office Equipment [Member] |  |
Property, plant, and equipment, gross | 557 | 557
Furniture and Fixtures [Member] |  |
Property, plant, and equipment, gross | 130 | 130
Land [Member] |  |
Property, plant, and equipment, gross | 1,418 | 1,418
Scientific Equipment [Member] |  |
Property, plant, and equipment, gross | 16,829 | 14,433
Vehicles [Member] |  |
Property, plant, and equipment, gross | 82 | 82
Building [Member] |  |
Property, plant, and equipment, gross | 22,773 | 21,013
Mobile Facility [Member] |  |
Property, plant, and equipment, gross | 189 | 189
Construction in Progress [Member] |  |
Property, plant, and equipment, gross | $ 2,061 | $ 2,625

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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale including building construction in process. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References No definition available. + Details
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