It looks like they accrued interest at 10% per year, but that may have only been the first year. It's a little bit confusing on that. They were also limited in being able to convert the shares during the first year, but after that could convert all or part at any time. It also looks like they had to convert them into shares, so they will be able to sell them for a profit when they want.
News 
Market Data 
Discover 
