They just "raised" $69 million from MRK and are fully funded thru 2H 2011 so more dilution was, fortunately, not necessary. As far as Rida failing, the Independent Data Monitoring Committee recommended that the trial "continue to its final analysis, without modification."
ARIA-Even if Rida fails I don't see an immediate need to raise cash. The restructured agreement with Merch gives ARIA cash till mid 2011. If the STS trial is not +ve then ARIA could potentially raise cash by partnering 534.