Annual report [Section 13 and 15(d), not S-K Item 405]

Note 6 - Property and Equipment, Net - Property and Equipment, Net (Details)

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Note 6 - Property and Equipment, Net - Property and Equipment, Net (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 544 $ 801
Accumulated depreciation 518 649
Property, plant and equipment, net 26 152
Laboratory Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 0 197
Accumulated depreciation 0 87
Property, plant and equipment, net 0 110
Computer Hardware [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 33 29
Accumulated depreciation 29 25
Property, plant and equipment, net 4 4
Computer Software [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 222 222
Accumulated depreciation 222 222
Property, plant and equipment, net 0 0
Office Furniture [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 118 140
Accumulated depreciation 117 132
Property, plant and equipment, net 1 8
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 171 213
Accumulated depreciation 150 183
Property, plant and equipment, net $ 21 $ 30