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Available-for-sale securities and certificate of deposit
 9 Months Ended
Sep. 30, 2012
Available-for-sale securities and certificate of deposit [Abstract]  
Available-for-sale securities and certificate of deposit

2. Available-for-sale securities and certificate of deposit

The following is a summary of the available-for-sale securities classified as current assets (in thousands):

 

                                                 
    September 30, 2012     December 31, 2011  
    Cost
Basis		     Gross
Unrealized
Gain		     Fair
Value		     Cost
Basis		     Gross
Unrealized
Gain		     Fair
Value		  

Common stock investment

   $ —       $ —       $ —       $ 117     $ 48     $ 165  

During the three months ended March 31, 2012, the Company determined its common stock investment to be other than temporarily impaired and recorded the $117,000 realized loss for available-for-sale securities as “Other income (expense)” in the condensed consolidated statements of operations. Gross unrealized gains and losses are included in “Other comprehensive gain (loss).”

The Company’s $350,000 certificate of deposit, having a maturity greater than 90 days, is held as collateral for the Company’s commercial credit card programs.