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Related Party Transactions
 6 Months Ended
Jun. 30, 2012
Related Party Transactions [Abstract]  
Related Party Transactions
12. Related Party Transactions
 
On April 1, 2009, we entered into an agreement with Sierra Partners LLC ("Sierra") pursuant to which Sierra agreed to provide us with investor relations and corporate finance consulting services.  A founder and partner of Sierra is also one of our directors. Under the terms of the agreement, Sierra provided us with consulting services commencing April 1, 2009 and ending on March 31, 2010, with the agreement continuing thereafter on a month-to-month basis.  Sierra provides support and analysis of our general corporate finance and strategy efforts.  As compensation for these services, we agreed to pay to Sierra a monthly retainer fee of $10 for the duration of the agreement.  We have issued 90,000 stock options to Sierra and recorded stock based compensation of $94 since inception of our relationship.  As of June 30, 2012, we had made payments to Sierra under the agreement totaling $390, of which $30 and $60 had been paid during the three and six months ended June 30, 2012, respectively.