I think the company paid back in cash, FD uses the money to buy stocks. It is win win for both parties. For example, company paid $10 dollars pack, FD only needs $5 to buy one share, the other $5 essentially covers the interest from the year 2016 to 2020, considering the interest rate is 10.5% annually. $10 for four years, the interest is $4.2 dollars. So as long as the share price is below $5.8, they can continue to do this. The net effect for the company is the same as share buyback. Next year, if the share price is below $6.85, they can continue to do that as well.