When you think about it, there's no reason for them to have sunk...

When you think about it, there's no reason for them to have sunk this low in the first place, apart from initial stakeholders (who got their shares more or less free at the float) selling off.
The IPO was at $1.50. Since then, they have done exactly what they promised in the prospectus; they are on track in construction and pilot projects. If anything, their forecasts of future income should be exceeded, since all fuel costs are rising - unless of course their feedstocks, capital works, cost of labour .. increase significantly - but there's no indication of this yet.
Wait a while. As they meet their targets on time, this stock will return to and overtake the IPO price.