XML 36 R25.htm IDEA: XBRL DOCUMENT v3.23.1
Note 9 - Fair Value of Financial Instruments (Tables)
3 Months Ended
Mar. 31, 2023
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
March 31, 2023 

Estimated Fair Value

  

Level 1

  

Level 2

  

Level 3

 

Assets:

                

Money market accounts

 $93,520  $93,520  $-  $- 

December 31, 2022

 

Estimated Fair Value

  

Level 1

  

Level 2

  

Level 3

 

Assets:

                

Money market account

 $102,681  $102,681  $-  $-