Still holding SGBX! They are repositioning their business model, very similar to XSPA in my opinion, but much more scalable. They also just partnered with Grimshaw to create pre fabricated education facilities. In addition to COVID testing, they won a $4M manufacturing contract and financially is a very healthy company.
I've only got a few hundred shares, but I think its undervalued and can easily double or triple with some new contracts, specifically COVID related.
https://finance.yahoo.com/news/sg-bl...123000261.html
https://seekingalpha.com/news/358874...uring-contract