Quarterly report pursuant to Section 13 or 15(d)

Organization and Summary of Significant Accounting Policies (Details)

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Organization and Summary of Significant Accounting Policies (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Fair value of the warrant liability        
Fair value, beginning of period $ 3,627 $ 0 $ 3,611 $ 0
Issuance of warrants 2,863 5,474 2,863 5,474
Change in fair value (1,955) 1,630 (1,939) 1,630
Fair value,end of period $ 4,535 $ 7,104 $ 4,535 $ 7,104