It depends on how much cash you have, how much risk you're willing to take on. You can buy 25,000 shares for about $11,000 right now. That would average you down to $1.10.
The EU and Asia market is huge, but will DCTH get the EU and Asia market? It's only huge if everyone uses the Melblez kit.
You're in a tight spot right now though, not much different than mine. Other than I've already averaged down before ODAC. I'm hoping this thing can get above a dollar in the next month or so. Who knows though.