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Note 4 - Balance Sheet Components (Tables)
9 Months Ended
Sep. 30, 2024
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  

September 30,

  

December 31,

 
  

2024

  

2023

 

Leasehold improvements

 $2,519  $2,519 

Laboratory equipment

  1,318   1,247 

Furniture, fixtures and equipment

  966   966 

Software

  272   272 

Construction in progress

  14    

Total property and equipment

  5,089   5,004 

Less: Accumulated depreciation and amortization

  (3,868)  (3,476)

Total property and equipment, net

 $1,221  $1,528 
Schedule of Finite-Lived Intangible Assets [Table Text Block]
  

September 30,

  

December 31,

 
  

2024

  

2023

 

Acquired patents and licenses

 $7,985  $7,985 

Less: Accumulated amortization

  (6,599)  (6,099)

Total intangible assets, net

 $1,386  $1,886 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Years ending December 31:

    

2024 (remaining 3 months)

 $165 

2025

  665 

2026

  556 

Total

 $1,386 
Schedule of Accrued Liabilities [Table Text Block]
  

September 30,

  

December 31,

 
  

2024

  

2023

 

Compensation expense

 $3,111  $3,199 

Clinical trial fees and costs

  80   84 

Professional fees

  424   343 

Other

  206   188 

Total accrued expenses

 $3,821  $3,814