Dave...new rules as of last September (A YEAR AGO) require these public trading Corporations to keep their SEC filings up to date. if they fall behind they are given some slack but we (HDVY) hasn't been able to file due to money. We are on what is called the "Expert Market" which sounds like BS.
When you see new filings added here then you will know when trading should start within 24 years so until then forget about trying to buy shares from any brokerage firm.