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Note 5 - Fair Value Measurements (Tables)
3 Months Ended
Dec. 31, 2021
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
  

December 31, 2021

 
  

Cost Basis

  

Unrealized

Gain (Loss)

  

Fair Value

  

Cash

Equivalents

  

Short-term

Securities

  

Long-term

Securities

 

Level 1:

                        

Money Market Funds

 $1,181  $-  $1,181  $1,181  $-  $- 
                         

Level 2:

                        

Certificates of deposit

  1,493   -   1,493   -   693   800 

Municipal securities

  4,907   (5)  4,902   -   3,106   1,796 

Corporate bonds

  929   (5)  924   -   139   785 

Subtotal

  7,329   (10)  7,319   -   3,938   3,381 
                         

Total

 $8,510  $(10) $8,500  $1,181  $3,938  $3,381 
  

September 30, 2021

 
  

Cost Basis

  

Unrealized

Gain (Loss)

  

Fair Value

  

Cash

Equivalents

  

Short-term

Securities

  

Long-term

Securities

 

Level 1:

                        

Money Market Funds

 $932  $-  $932  $932  $-  $- 
                         

Level 2:

                        

Certificates of deposit

  1,494   -   1,494   -   694   800 

Municipal securities

  5,139   (1)  5,138   -   4,205   933 

Corporate bonds

  928   1   929   -   787   142 

Subtotal

  7,561   -   7,561   -   5,686   1,875 
                         

Total

 $8,493  $-  $8,493  $932  $5,686  $1,875 
Fair Value Measurements, Nonrecurring [Table Text Block]
  

Carrying

Value

  

Level 1

  

Level 2

  

Level 3

  

Gain/ (Loss)

 

Operating lease ROU asset

 $7  $-  $-   7  $- 
Holdback Liability [Member]  
Notes Tables  
Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]

Balance as of September 30, 2021

 $687 

Accretion

  11 

Currency translation

  1 

Balance as of December 31, 2021

 $699