It was mentioned in a filing and a PR. I think if you look at otcbb.com and go to sec filings, it's there. Or, try SEC.gov and there is a filing and an 8k that held their PR.
The stock has been hammered with the rest of the industry. But, if you look at what just happened at UNLL, a company with the same balance sheet style as PDO, it really shows what value some of these small cap plays can do.