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Note 4 - Balance Sheet Components (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  

September 30,

  

December 31,

 
  

2025

  

2024

 

Leasehold improvements

 $2,519  $2,519 

Laboratory equipment

  1,522   1,342 

Furniture, fixtures and equipment

  966   966 

Software

  283   272 

Construction in progress

  46   29 

Total property and equipment

  5,336   5,128 

Less: Accumulated depreciation and amortization

  (4,281)  (3,968)

Total property and equipment, net

 $1,055  $1,160 
Schedule of Finite-Lived Intangible Assets [Table Text Block]
  

September 30,

  

December 31,

 
  

2025

  

2024

 

Acquired patents and licenses

 $8,005  $7,985 

Less: Accumulated amortization

  (7,264)  (6,765)

Total intangible assets, net

 $741  $1,220 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Years ending December 31:

    

2025 (remaining 3 months)

 $166 

2026

  575 

Total

 $741 
Schedule of Accrued Liabilities [Table Text Block]
  

September 30,

  

December 31,

 
  

2025

  

2024

 

Compensation expense

 $3,588  $4,097 

Clinical trial fees and costs

  953   284 

Professional fees

  311   564 

Legal settlement

     1,196 

Severance

     698 

Other

  351   188 

Total accrued expenses

 $5,203  $7,027