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FAIR VALUE INSTRUMENTS
12 Months Ended
Dec. 31, 2020
Fair Value Disclosures [Abstract]  
Fair Value Disclosures [Text Block]
5. FAIR VALUE INSTRUMENTS
 
In accordance with ASC Topic 820, the Company measures cash and cash equivalents, marketable debt and equity securities at fair value on a recurring basis. Other investments are measured at fair value on a nonrecurring basis.
 
The following are the major categories of assets and liabilities measured at fair value on a recurring basis during the years ended December 31, 2020 and 2019, using quoted prices in active markets for identical assets (Level 1) and significant other observable inputs (Level 2). For the years ended December 31, 2020 and 2019, there were no major assets or liabilities measured at fair value on a recurring basis which uses significant unobservable inputs (Level 3):
 
  Fair value measurement at reporting date using 
Description Total
December 31,
2020
  Quoted Prices in Active
Markets for Identical Assets
(Level 1)
  Significant Other
Observable Inputs
(Level 2)
  Significant
Unobservable Inputs
(Level 3)
 
Assets:                
 Cash equivalents:                
Money market mutual funds $1,496,000  $1,496,000  $  $ 
US T-bills  2,900,000   2,900,000       
Marketable securities:                
Corporate debt securities  613,000      613,000    
Marketable equity securities  2,793,000   2,793,000       
Total assets $7,802,000  $7,189,000  $613,000  $ 
 
 
 
Fair value measurement at reporting date using
 
Description
 
Total
December 31,
2019
 
 
Quoted Prices in Active
Markets for Identical Assets
(Level 1)
 
 
Significant Other
Observable Inputs
(Level 2)
 
 
Significant
Unobservable Inputs
(Level 3)
 
Assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Cash equivalents:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Money market mutual funds
 
$
606,000
 
 
$
606,000
 
 
$
 
 
$
 
     US T-bills
 
 
14,130,000
 
 
 
14,130,000
 
 
 
 
 
 
 
 
Marketable securities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Corporate debt securities
 
 
474,000
 
 
 
 
 
 
474,000
 
 
 
 
Marketable equity securities
 
 
2,999,000
 
 
 
2,999,000
 
 
 
 
 
 
 
Total assets
 
$
18,209,000
 
 
$
17,735,000
 
 
$
474,000
 
 
$
 
Carrying amount is the estimated fair value for corporate debt securities and time deposits based on a market-based approach using observable (Level 2) inputs such as prices of similar assets in active markets.