I am sure a lot of potential buyers have been doing their DD....IMHO, if an offer was accepted within the next month or so, we're looking at April-May '14, until we all enjoy the benefits...
I do not believe the DD will take long at all and as WWWWWW pointed out has probably already been done. The patents are very straightforward and any technology expert would understand that the technology is already in place. A suitor does not need to learn how RBR works because they and everyone else are already doing it. Same probably goes for MG.
The company is small so DD is not going to take time. The proxy process will take a few weeks. The entire process can probably be done inside of 60 days from the announcement of an offer til the closing.