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FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)
3 Months Ended
Dec. 31, 2011
FAIR VALUE OF FINANCIAL INSTRUMENTS [Abstract]  
Schedule of fair value of financial instruments
The following table presents assets that we measured at fair value on a recurring basis at December 31, 2011 and September 30, 2011.  As permitted under the relevant standards, we have chosen to not measure any of our liabilities at fair value as we believe our liabilities approximate their fair value due to their short-term, highly liquid characteristics.  We have classified the following assets in accordance with the fair value hierarchy set forth in the applicable standards.  In instances where the inputs used to measure the fair value of an asset fall into more than one level of the hierarchy, we have classified them based on the lowest level input that is significant to the determination of the fair value.

December 31, 2011
 
Level 1
  
Level 2
  
Level 3
  
Total
Fair Value
 
Cash and cash equivalents
 $293,628  $-  $-  $293,628 
Auction rate securities (ARS)
  -   -   8,041   8,041 
Other long-term investments
  1,016   -   -   1,016 
Total
 $294,644  $-  $8,041  $302,685 

September 30, 2011
 
Level 1
  
Level 2
  
Level 3
  
Total
Fair Value
 
Cash and cash equivalents
 $302,546  $-  $-  $302,546 
Auction rate securities (ARS)
  -   -   8,041   8,041 
Other long-term investments
  827   -   -   827 
Total
 $303,373  $-  $8,041  $311,414