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Investments and Fair Value Measurements (Tables)
 9 Months Ended
Sep. 30, 2012
Investments and Fair Value Measurements [Abstract]  
Cash, cash equivalents and investments
Our cash, cash equivalents and investments are classified as follows (in thousands):

   
September 30, 2012
  
December 31, 2011
 
      
Gross
  
Gross
        
Gross
  
Gross
    
   
Amortized
  
Unrealized
  
Unrealized
  
Fair
  
Amortized
  
Unrealized
  
Unrealized
  
Fair
 
   
Cost
  
Gain
  
(Loss)
  
Value
  
Cost
  
Gain
  
(Loss)
  
Value
 
Classified as:
                        
Cash
 $27,490  $-  $-  $27,490  $25,299  $-  $-  $25,299 
Cash equivalents:
                                
Money market fund
  8,013   -   -   8,013   857   -   -   857 
                                  
Total cash equivalents
  8,013   -   -   8,013   857   -   -   857 
                                  
Total cash and cash equivalents
  35,503   -   -   35,503   26,156   -   -   26,156 
                                  
Investments (Available for sale):
                                
Certificates of deposit
  6,878   7   (4 )  6,881   3,561   5   (3 )  3,563 
US Treasury and agency securities
  -   -   -   -   1,200   -   (1 )  1,199 
Corporate bonds
  9,085   12   (34 )  9,063   9,859   2   (137 )  9,724 
Total investments
  15,963   19   (38 )  15,944   14,620   7   (141 )  14,486 
Total cash, cash equivalents and investments
 $51,466  $19  $(38) $51,447  $40,776  $7  $(141) $40,642 
Contractual maturities on investments:
                                
Due within 1 year
 $10,581          $10,577  $5,521          $5,505 
Due after 1 through 5 years
  5,382           5,367   9,099           8,981 
   $15,963          $15,944  $14,620          $14,486 
Fair value and gross unrealized losses related to available-for-sale securities
The following table summarizes the fair value and gross unrealized losses related to available-for-sale securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of September 30, 2012 (in thousands):

 
In Loss Position
< 12 months
 
 
In Loss Position
> 12 months
 
 
Total In
Loss Position
 
 
 
 
 
Gross
 
 
 
 
 
Gross
 
 
 
 
 
Gross
 
 
Fair
 
 
Unrealized
 
 
Fair
 
 
Unrealized
 
 
Fair
 
 
Unrealized
 
 
Value
 
 
(Loss)
 
 
Value
 
 
(Loss)
 
 
Value
 
 
(Loss)
 
Investments:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Certificates of deposit
 
$
3,314
 
 
$
(3
)
 
$
200
 
 
$
(1
)
 
$
3,514
 
 
$
(4
)
Corporate bonds
 
 
2,725
 
 
 
(17
)
 
 
1,517
 
 
 
(17
)
 
 
4,242
 
 
 
(34
)
Total in loss position
 
$
6,039
 
 
$
(20
)
 
$
1,717
 
 
$
(18
)
 
$
7,756
 
 
$
(38
)
The following table summarizes the fair value and gross unrealized losses related to available-for-sale securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2011 (in thousands):

In Loss Position
< 12 months
Total In
Loss Position
Gross
Gross
Fair
Unrealized
Fair
Unrealized
Value
(Loss)
Value
(Loss)
Investments:
Certificates of Deposit
678(3)678(3)
US Treasury and agency securities
1,199(1)1,199(1)
Corporate bonds
$8,221$(137)$8,221$(137)
Total in loss position
$10,098$(141)$10,098$(141)
Summary of financial assets and liabilities measured at fair value on a recurring basis
The following table summarizes our financial assets and liabilities measured at fair value on a recurring basis in accordance with ASC 820 as of September 30, 2012 (in thousands):

 
Balance as of
September 30, 2012
 
 
Quoted Prices in
Active Markets of
Identical Assets
(Level 1)
 
 
Significant Other
Observable
Inputs
(Level 2)
 
Assets:
 
 
 
 
 
 
 
 
 
Cash equivalents and investments:
 
 
 
 
 
 
 
 
 
Money market fund
 
$
8,013
 
 
$
8,013
 
 
$
-
 
Certificates of deposit
 
 
6,881
 
 
 
-
 
 
 
6,881
 
Corporate bonds
 
 
9,063
 
 
 
-
 
 
 
9,063
 
Total
 
$
23,957
 
 
$
8,013
 
 
$
15,944
 
Liabilities
 
$
-
 
 
$
-
 
 
$
-
 
 The following table summarizes our financial assets and liabilities measured at fair value on a recurring basis in accordance with ASC 820 as of December 31, 2011 (in thousands):
Balance as of
December 31, 2011
Quoted Prices in
Active Markets of
Identical Assets
(Level 1)
Significant Other
Observable Inputs
(Level 2)
Assets:
Cash equivalents and investments:
Money market fund – cash
$857$857$—
Certificates of deposit
3,563—3,563
US Treasury and agency securities
1,199—1,199
Corporate bonds
9,724—9,724
Total
$15,343$857$14,486
Liabilities
$—$—$—