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FAIR VALUE MEASUREMENTS
12 Months Ended
Dec. 31, 2017
FAIR VALUE MEASUREMENTS [Abstract]  
FAIR VALUE MEASUREMENTS
3. FAIR VALUE MEASUREMENTS

The authoritative literature for fair value measurements established a three-tier fair value hierarchy, which prioritizes the inputs in measuring fair value. These tiers are as follows: Level 1, defined as observable inputs such as quoted market prices in active markets; Level 2, defined as inputs other than the quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as significant unobservable inputs (entity developed assumptions) in which little or no market data exists.
 
As of December 31, 2017, the Company held certain investments that are required to be measured at fair value on a recurring basis. The following tables present the Company’s fair value hierarchy for these financial assets as of December 31, 2017 and 2016:

December 31, 2017
 
Type of Instrument
  
Fair Value
  
Level 1
  
Level 2
  
Level 3
 
              
Cash equivalents
Institutional Money Market
 
$
3,108,549
  
$
3,108,549
  
$
-
  
$
-
 
                  
Cash equivalents
Municipal Bonds
  
800,000
   
-
   
800,000
   
-
 
                  
Investments
Municipal Bonds
  
1,102,650
   
-
   
1,102,650
   
-
 
                  
Investments
Corporate Bonds
  
51,299,068
   
-
   
51,299,068
   
-
 
                  
Investments
Certificates of Deposit
  
5,318,227
   
5,318,227
   
-
   
-
 
              
December 31, 2016
 
Type of Instrument
  
Fair Value
  
Level 1
  
Level 2
  
Level 3
 
              
Cash equivalents
Institutional Money Market
 
$
2,290,331
  
$
2,290,331
  
$
-
  
$
-
 
                  
Investments
Municipal Bonds
  
7,554,028
   
-
   
7,554,028
   
-
 
                  
Investments
Corporate Bonds
  
33,354,407
   
-
   
33,354,407
   
-
 
                  
Investments
Certificates of Deposit
  
7,117,807
   
7,117,807
   
-
   
-