v3.25.4
Note 3 - Property and Equipment and Building Construction in Progress - Property and Equipment, Net (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Depreciation $ 1,686 $ 1,745 $ 1,700
Accumulated depreciation   (21,670) (19,985)
Property, Plant and Equipment, Including Building Construction in Process   23,129 24,526
Research and Development Expense [Member]      
Depreciation 1,683 1,742  
General and Administrative Expense [Member]      
Depreciation $ 3 3  
Office Equipment [Member]      
Property, plant, and equipment, gross   293 290
Furniture and Fixtures [Member]      
Property, plant, and equipment, gross   133 133
Land [Member]      
Property, plant, and equipment, gross   1,418 1,418
Scientific Equipment [Member]      
Property, plant, and equipment, gross   16,689 16,491
Vehicles [Member]      
Property, plant, and equipment, gross   112 112
Building [Member]      
Property, plant, and equipment, gross   24,173 24,173
Mobile Facility [Member]      
Property, plant, and equipment, gross   189 189
Construction in Progress [Member]      
Property, plant, and equipment, gross   $ 1,792 $ 1,705