It's, whenever we grow, we want to make sure that it's tied to a market indicator, right. And basically really has to start with relative competitive advantage and position of the technology, the market has to be there, right and good thing about where we are now with solar procurement, it used to be policy lead now it's economic procurement, people are buying solar from the pure economic standpoint. And so I don't really see any constraints on the market, per se. But we do look to markets where we would have advantages around our technology. So hot, humid climates, for example, would be a market, they would be attractive to us; again, being closer to the market, or at least driving efficient shipment, logistics routes to access the market is important. The reality is freight cost is 10%, north of 10% of the overall cost of the product. And so if you can get that number down, say cut it in half, you get 5% savings just by getting closer to the customer and reducing your overall freight costs to deliver over the technology. There are many other factors that we use when we screen a site; energy is a meaningful component of our overall costs. So we have to have competitive cost of energy, labor rates have to be competitive, from math standpoint as well, while the processes are largely automated, still major component of the overall cost structure that has to be thought through and whenever we make decisions of where we're going to manufacture. But the reality is that we will grow most likely it's probably going to be outside of the US as we currently envision it, it could change. We have ability just to expand within the footprint and drive more throughput of what we already have here in the US, as we think about where our next factory would be, as we currently envision it would probably be in an international market somewhere close to customers, close to where there's a strong recurring annual demand requirement, and one that we have our technology is well positioned and competitively advantage whether it's hot, humid climates, whether it's the advantages of our Co2 footprint, environmental aspects around our technology, which more and more markets are starting to value. Those are the types of things that we take in consideration as we think about any expansion.