I appreciate the tip on the BDCs. I've not invested in any yet, but may do so in the future.
Hercules looks like a decent company. They also have a 7% exchange traded bond that matures in 2019, but it is trading above the $25 par value. A combination of the two may be a decent investment choice.
No problem - another place to do a little digging is into the public companies that HTGC invests in. They do a lot of the DD for you. They don't invest to lose money and have far more resources available to them than the average retail investor.