Selected Quarterly Financial Data (Unaudited)

12 Months Ended

Mar. 31, 2012

Notes to Financial Statements [Abstract]

14. Selected Quarterly Financial Data (Unaudited)

	FISCAL 2012
	4th QTR			3rd QTR		2nd QTR		1st QTR
Oil and gas revenue	$	753,875		$	753,789	$	810,655	$	905,340
Operating profit (loss)		(1,305	)		63,837		111,466		156,680
Net income		95,375			50,961		79,272		104,385
Net income per share – basic		0.04			0.03		0.04		0.05
Net income per share – diluted		0.04			0.03		0.04		0.05

	FISCAL 2011
	4th QTR		3rd QTR		2nd QTR		1st QTR
Oil and gas revenue	$	776,469	$	752,778	$	783,990	$	832,010
Operating profit (loss)		88,177		68,100		59,722		(39,898	)
Net income (loss)		52,982		26,898		70,040		5,776
Net income (loss) per share – basic		0.03		0.01		0.04		0.00
Net income (loss) per share – diluted		0.03		0.01		0.04		0.00