Boston,
your gleanings from 2015 sound like there was some unhappiness with being a publicly traded company--when that is what they are, piggy-backing shareholders and all. Perhaps there were conflicting views around the IPO or taking it private, etc. Anyway, I would be really interested in knowing more about current shareholders as a group--but this info isn't forthcoming. Cl101 has emphasized the ongoing polishing/cleaning/symplifying process of finances, warrants, loans, etc, so it doesn't quite follow that the company would issue a new class of preferreds plus warrants unless it was a strategic necessity. These filings, nevertheless, do, maintain a substantial wall of uncertainty...
glta