Romans & Boomer, I agree that the present debt level is very manageable and there is room to take on some more debt. I like to look at EBITDA/ Interest Expense, and that was about 10:1 for 1Q, which is considered "investment grade" I believe.
When I first saw, when the 1Q 10Q got filed, that they maxed out their line in April, I got a bit spooked but then I remembered the seasonality of their drilling program (due to prairie chickens) and it turns out that their total cap ex for 2Q '11 was a mere $1.2M. Its likely that their cap ex for 2Q '12 was probably something similar to this figure. Considering they had $2.9M of accounts receivable at 3/31/12, just about all of which got collected in 2Q, it seems likely that they simply had no need to increase their debt capacity for 2Q.
3Q is another story though -- I'm expecting the drilling program to ramp up this quarter, probably to a level that exceeds their cash flow. Maybe they'll announce a new debt facility in conjunction with their annual meeting on 7/31.