v3.22.2.2
Note 2 - Investments and Fair Value Measurement (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Cash, Cash Equivalents and Investments [Table Text Block]
  

As of September 30, 2022

 
  

Amortized Cost

  

Gross Unrealized
Gains

  

Gross Unrealized
Losses

  

Fair
Value

 

Cash, cash equivalents and restricted cash:

                

Cash

 $4,533  $  $  $4,533 

Money market funds

  113         113 

U.S. government agency securities

  7,193         7,193 

Commercial paper

  5,893         5,893 

Total cash, cash equivalents and restricted cash

  17,732         17,732 
                 

Short-term investments:

                

Commercial paper

  3,194         3,194 

Total short-term investments

  3,194         3,194 

Total cash, cash equivalents, restricted cash and short-term investments

 $20,926  $  $  $20,926 
  

As of December 31, 2021

 
  

Amortized Cost

  

Gross Unrealized
Gains

  

Gross Unrealized
Losses

  

Fair
Value

 

Cash, cash equivalents and restricted cash:

                

Cash

 $1,443  $  $  $1,443 

Money market funds

  2,822         2,822 

Commercial paper

  8,398         8,398 

Total cash, cash equivalents and restricted cash

  12,663         12,663 
                 

Short-term investments:

                

Commercial paper

  29,504         29,504 

Corporate debt securities

  9,463         9,463 

Total short-term investments

  38,967         38,967 

Total cash, cash equivalents, restricted cash and short-term investments

 $51,630  $  $  $51,630 
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
  

As of September 30, 2022

 
  

Fair Value

  

Level I

  

Level II

  

Level III

 

Assets

                

Money market funds

 $113  $113  $  $ 

U.S. government agency securities

  7,193      7,193    

Commercial paper

  9,087      9,087    

Total assets measured at fair value

 $16,393  $113  $16,280  $ 
                 

Liabilities

                

Contingent put option liability

 $27  $  $  $27 

Total liabilities measured at fair value

 $27  $  $  $27 
  

As of December 31, 2021

 
  

Fair Value

  

Level I

  

Level II

  

Level III

 

Assets

                

Money market funds

 $2,822  $2,822  $  $ 

Commercial paper

  37,902      37,902    

Corporate debt securities

  9,463      9,463    

Total assets measured at fair value

 $50,187  $2,822  $47,365  $ 
                 

Liabilities

                

Contingent put option liability

 $81  $  $  $81 

Total liabilities measured at fair value

 $81  $  $  $81 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
  

Three Months
Ended
September 30,
2022

  

Nine Months
Ended
September 30,
2022

 

Fair value—beginning of period

 $49  $81 

Change in fair value of contingent put option associated with the Loan Agreement

  (22

)

  (54

)

Fair value—end of period

 $27  $27 
  

Three Months
Ended
September 30,
2021

  

Nine Months
Ended
September 30,
2021

 

Fair value—beginning of period

 $128  $246 

Change in fair value of contingent put option associated with the Loan Agreement

  (19

)

  (137

)

Fair value—end of period

 $109  $109