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Concentration of Risk, Segment and Geographic Information
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12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2011
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| Concentration of Risk, Segment and Geographic Information [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Concentration of Risk, Segment and Geographic Information |
Concentration of Risk
Cash equivalents and receivables are financial instruments, which potentially subject the Company to concentrations of credit risk, as well as liquidity risk for certain cash equivalents such as money market funds. The Company has not encountered such issues during 2011.
The Company has not experienced any significant credit losses and does not generally require collateral on receivables. For the year ended December 31, 2011, two customers represented 61% and 32% of total revenue and as of December 31, 2011, these two customers representing 57% and 43% of the accounts receivable balance.
For the year ended December 31, 2010, three customers represented 64%, 13%, and 11% of total revenue and as of December 31, 2010, there were billed receivables of $19.7 million outstanding from two customers representing 72% and 23% of the accounts receivable balance. For the year ended December 31, 2009, two customers represented 36% and 29% of total revenue.
Segment Information
The Company has determined that it operates in one segment as it only reports operating results on an aggregate basis to the chief operating decision maker of the Company. The Company's property and equipment is held primarily in the United States.
Geographic Information
Revenue attributed to the following geographic regions for each of the three years ended December 31, 2011, 2010 and 2009 was as follows (in thousands):
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