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Note 4 - Fair Value Measurements
12 Months Ended
Sep. 30, 2015
Notes to Financial Statements  
Fair Value Disclosures [Text Block]
4. FAIR VALUE MEASUREMENTS
 
At September 30, 2015, for certain financial instruments, including accounts receivable, accounts payable and accrued expenses, the carrying amounts approximate fair value due to their relatively short maturities.
 
Our financial instruments consist principally of cash equivalents, short and long-term marketable securities, accounts receivable and accounts payable. The fair value of a financial instrument is the amount that would be received in an asset sale or paid to transfer a liability in an orderly transaction between unaffiliated market participants. Assets and liabilities measured at fair value are categorized based on whether or not the inputs are observable in the market and the degree that the inputs are observable. The categorization of financial instruments within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The hierarchy is prioritized into three levels (with Level 3 being the lowest) defined as follows:
 
Level 1:     Inputs are based on quoted market prices for identical assets or liabilities in active markets at the measurement date.
 
Level 2:     Inputs include quoted prices for similar assets or liabilities in active markets and/or quoted prices for identical or similar assets or liabilities in markets that are not active near the measurement date.
 
Level 3:     Inputs include management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date. The inputs are unobservable in the market and significant to the instrument’s valuation.
 
The fair value of our cash equivalents and marketable securities was determined based on Level 1 and Level 2 inputs. We do not have any marketable securities in the Level 3 category. We believe that the recorded values of all our other financial instruments approximate their current fair values because of their nature and respective relatively short maturity dates or durations.
 
In
vestments
Measured at Fair Value
 
The following table presents our cash equivalents and marketable securities’ costs, gross unrealized gains and losses, and fair value by major security type recorded as cash and cash equivalents or short-term or long-term marketable securities at September 30, 2015. At September 30, 2014, we did not have any investments that are required to be measured at fair value on a recurring basis.
 
           
Unrealized
   
Fair
   
Cash and Cash
   
Short-term
   
Long-term
 
   
Cost Basis
   
Gains/(Losses)
   
Value
   
Equivalents
   
Securities
   
Securities
 
                                                 
Level 1:
                                               
Money Market Funds
  $ 301,193     $ -     $ 301,193     $ 301,193     $ -     $ -  
                                                 
Level 2:
                                               
Certificates of deposit
    3,296,238       -       3,296,238       -       249,072       3,047,166  
Municipal securities
    654,205       293       654,498       160,058       494,440       -  
Corporate bonds
    509,029       (594 )     508,435       -       508,435       -  
Subtotal
    4,459,472       (301 )     4,459,171       160,058       1,251,947       3,047,166  
                                                 
Total
  $ 4,760,665     $ (301 )   $ 4,760,364     $ 461,251     $ 1,251,947     $ 3,047,166