The major problem is the dual share structure of the stock. 100% of the voting shares are held by the CEO. The stock you and I can buy has no voting rights. A lot of institutional investors like to have some say-so in corporate governance and shy away from this type of structure. Also, it is very thinly traded (only 12MM+ shares outstanding).
Because this company still has significant outstanding issues with Auction Rate Securities still on the books. This is a major unknown since Finra arbitrators have started finding for clients in these cases.