v3.26.1
Note 4 - Fair-value Measurements (Tables)
6 Months Ended
Jun. 30, 2026
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
   

June 30, 2026

 
   

Level 1

   

Level 2

   

Level 3

   

Total

 
   

(In thousands)

 

Assets:

                         

Cash and cash equivalents:

                               

Certificate of deposit classified as non-current restricted investments

  $ 1,054     $     $     $ 1,054  

Short-term investments:

                               

Money-market funds

    129,965                   129,965  

Total Assets

  $ 131,019     $     $     $ 131,019  
                                 
                                 

Liabilities:

                               

2029 Notes:

                               

2029 Notes conversion option derivative

  $     $     $ (55,216 )   $ (55,216 )

2029 Notes repurchase obligation, net

          (31,259 )           (31,259 )

Total Liabilities

  $     $ (31,259 )   $ (55,216 )   $ (86,475 )
   

December 31, 2025

 
   

Level 1

   

Level 3

   

Total

 
   

(In thousands)

 

Assets:

                 

Cash and cash equivalents:

                       

Certificate of deposit classified as non-current restricted investments

  $ 1,054     $     $ 1,054  

Short-term investment

                       

Money-market funds

    162,144             162,144  

Total Assets

  $ 163,198     $     $ 163,198  
                         

Liabilities:

                       

2029 Notes:

                       

2029 Notes conversion option derivative

  $     $ (157,171 )   $ (157,171 )

Total Liabilities

  $     $ (157,171 )   $ (157,171 )
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
   

June 30,

   

December 31,

 
   

2026

   

2025

 

2029 Note conversion option derivative

               
                 

Stock price (per share)

  $ 9.51     $ 17.18  

Unsecuritized discount rate

    18.32 %     18.03 %

Risk-free rate

    4.07 %     3.53 %

Stock price volatility

    70 %     75 %

Dividend yield

    %     %

Term (in years)

    3.0       3.5  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
   

Balance as of

                           

Balance as of

 
   

December 31,

                   

Conversions and

   

June 30,

 
   

2025

   

Additions

   

Change in Fair Value

   

Extinguishments

   

2026

 
   

(In thousands)   

 
                                         

Liabilities

                                       

2029 Notes

                                       

2029 Notes conversion option derivative

  $ (157,171 )   $     $ 85,266     $ 16,689 (1)     (55,216 )

2029 Notes repurchase obligation, net

          (30,586 )     (673 )           (31,259 )(2)

Total

  $ (157,171 )   $ (30,586 )   $ 84,593     $ 16,689     $ (86,475 )