Annual report pursuant to Section 13 and 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
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Fair value of the warrant liability    
Fair value, beginning of period $ 3,611 $ 0
Issuance of warrants 2,863 5,473
Change in fair value 1,766 (1,862)
Fair value, end of period $ 8,240 $ 3,611