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Restricted Cash
6 Months Ended
Jun. 30, 2011
Restricted Cash
2.  Restricted Cash

Restricted cash represents balances with a financial institution not immediately available for use by the Company.  At June 30, 2011, the Company had restricted cash of $3.3 million and no amounts of restricted cash at December 31, 2010.  The restrictions on the Company’s cash are primarily related to outstanding domestic letters of credit issued during the ordinary course of business, to satisfy security deposits requirements.  These domestic letters of credit are secured by the Company’s cash and are held in escrow with a financial institution.  On July 15, 2011, $2.4 million of the restricted cash was released from escrow and returned to the Company.