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Note 4 - Balance Sheet Components (Tables)
12 Months Ended
Dec. 31, 2024
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  

December 31,

 
  

2024

  

2023

 

Leasehold improvements

 $2,519  $2,519 

Laboratory equipment

  1,342   1,247 

Furniture, fixtures and equipment

  966   966 

Software

  272   272 

Construction in progress

  29    
   5,128   5,004 

Less: Accumulated depreciation and amortization

  (3,968)  (3,476)
  $1,160  $1,528 
Schedule of Finite-Lived Intangible Assets [Table Text Block]
  

December 31,

 
  

2024

  

2023

 

Acquired patents and licenses

 $7,985  $7,985 

Less: Accumulated amortization

  (6,765)  (6,099)
  $1,220  $1,886 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Years ending December 31:

    

2025

 $665 

2026

  555 
  $1,220 
Schedule of Accrued Liabilities [Table Text Block]
  

December 31,

 
  

2024

  

2023

 

Compensation expense

 $4,097  $3,199 

Legal settlement

  1,196    

Severance

  698    

Professional fees

  564   343 

Clinical trial fees and costs

  284   84 

Other

  188   188 
  $7,027  $3,814