STATEMENTS OF OPERATIONS (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Feb. 28, 2014
Feb. 28, 2013
Feb. 28, 2014
Feb. 28, 2013
STATEMENTS OF OPERATIONS [Abstract]        
Oil and gas revenues $ 23,028 $ 10,921 $ 42,294 $ 19,235
Expenses        
Lease operating expenses 1,806 781 3,079 1,304
Production taxes 2,255 1,094 4,271 1,908
Depletion, depreciation, and amortization 7,719 3,176 13,310 5,496
General and administrative 1,770 1,388 4,938 2,499
Total expenses 13,550 6,439 25,598 11,207
Operating income 9,478 4,482 16,696 8,028
Other income (expense)        
Commodity derivative realized loss (191) (20) (589) (20)
Commodity derivative unrealized gain (loss) (1,805) (134) 831 (134)
Interest income 17 8 48 15
Total other income (expense) (1,979) (146) 290 (139)
Income before income taxes 7,499 4,336 16,986 7,889
Deferred income tax provision (2,338) (1,604) (5,725) (2,919)
Net income $ 5,161 $ 2,732 $ 11,261 $ 4,970
Net income per common share:        
Basic $ 0.07 $ 0.05 $ 0.15 $ 0.09
Diluted $ 0.07 $ 0.05 $ 0.15 $ 0.09
Weighted average shares outstanding:        
Basic 76,203,938 54,900,326 74,934,940 53,272,213
Diluted 77,990,416 56,481,752 76,843,593 54,713,361