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Note 12 - Stock-based Compensation (Tables)
6 Months Ended
Jun. 30, 2026
Notes Tables  
Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]

Expected term (years)

4.6 - 4.9

 

Expected volatility

140.0

 %

Risk-free interest rate

3.7% - 4.2

 %

Dividend yield

 %

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

 

 

Three months ended June 30,

 

 

Six months ended June 30,

 

 

 

2026

 

 

2025

 

 

2026

 

 

2025

 

Research and development

 

$304

 

 

$316

 

 

$515

 

 

$1,011

 

Sales and marketing

 

 

167

 

 

 

126

 

 

 

251

 

 

 

255

 

General and administrative

 

 

1,948

 

 

 

718

 

 

 

3,195

 

 

 

2,395

 

Total stock-based compensation

 

$2,419

 

 

$1,160

 

 

$3,961

 

 

$3,661