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FAIR VALUE (Tables)
3 Months Ended
Mar. 31, 2023
FAIR VALUE [Abstract]  
Fair Value of Financial Instruments Measured on Recurring Basis
The Company measures the fair value of money market funds using Level 1 inputs.  As of March 31, 2023, the Company has four treasury bills, all with maturity dates of three months or less, classified as cash equivalents.  The treasury bills are valued using Level 1 inputs.  Pricing sources may include industry standard data providers, security master files from large financial institutions and other third-party sources used to determine a daily market value.

   
March 31, 2023
 
   
Carrying
   
Quoted Prices in Active Markets for Identical Assets
   
Significant Other Observable Inputs
   
Significant Unobservable Inputs
       
   
Amount
   
(Level 1)
   
(Level 2)
   
(Level 3)
   
Total
 
Cash equivalents:
                             
Money market fund
 
$
5,262
   
$
5,262
   
$
-
   
$
-
   
$
5,262
 
Treasury bill
   
20,715
     
20,715
     
-
     
-
     
20,715
 
                                         
Short-term investments:
                                       
Treasury bill
   
14,758
     
14,926
     
-
     
-
     
14,926
 
    Total cash equivalents
 
$
40,735
   
$
40,903
   
$
-
   
$
-
   
$
40,903