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Note 9 - Fair Value of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

December 31, 2022

 

Estimated Fair Value

   

Level 1

   

Level 2

   

Level 3

 

Assets:

                               

Money market account

  $ 102,681     $ 102,681     $ -     $ -  
                                 
                                 

December 31, 2021

 

Estimated Fair Value

   

Level 1

   

Level 2

   

Level 3

 

Assets:

                               

Money market account

  $ 51,796     $ 51,796     $ -     $ -  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Warrant Liability

       

Beginning balance

  $ 13,003  

Reclassification of equity upon adoption of accounting standard

    (13,003 )

Issuance of warrants

    -  

Change in fair value

    -  

Ending balance

  $ -