Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Common Stock Warrants (right to buy)^F1,F2	$1.82	Mar 31, 2015	J	979,179	A	Mar 31, 2015	Sep 30, 2022	Common Stock	979,179	979,179	I
Common Stock Warrants (right to buy)^F1,F2	$1.82	Mar 31, 2015	J	32,628	A	Mar 31, 2015	Sep 30, 2022	Common Stock	32,628	32,628	I
Common Stock Warrants (right to buy)^F1,F2	$1.82	Mar 31, 2015	J	35,071	A	Mar 31, 2015	Sep 30, 2022	Common Stock	35,071	35,071	I
Common Stock Warrants (right to buy)^F3,F2	$19.50	Mar 31, 2015	J	11,492	A	Mar 31, 2015	Sep 30, 2022	Common Stock	11,492	11,492	I
Common Stock Warrants (right to buy)^F3,F2	$19.50	Mar 31, 2015	J	382	A	Mar 31, 2015	Sep 30, 2022	Common Stock	382	382	I
Common Stock Warrants (right to buy)^F3,F2	$19.50	Mar 31, 2015	J	411	A	Mar 31, 2015	Sep 30, 2022	Common Stock	411	411	I
Common Stock Warrants (right to buy)^F4,F2	$14.20	Mar 31, 2015	J	16,332	A	Mar 31, 2015	Sep 30, 2022	Common Stock	16,332	16,332	I
Common Stock Warrants (right to buy)^F4,F2	$14.20	Mar 31, 2015	J	543	A	Mar 31, 2015	Sep 30, 2022	Common Stock	543	543	I
Common Stock Warrants (right to buy)^F4,F2	$14.20	Mar 31, 2015	J	585	A	Mar 31, 2015	Sep 30, 2022	Common Stock	585	585	I

Explanation of responses

F1Pursuant to a Securities Purchase Agreement dated September 2, 2010 between the Reporting Persons and the Issuer, the Reporting Persons acquired, among other securities of the Issuer, warrants to purchase an aggregate 19,047,619 shares of the Issuer's common stock. The Reporting Persons also acquired the right to receive additional warrants on each quarterly dividend payment date of the Issuer's Series A Preferred Stock on which dividends are not paid in cash but instead accrue. On March 31, 2015, one such date passed, and thus the Reporting Persons acquired an aggregate of 1,046,878 warrants on March 31, 2015.
F2Mr. Edelman has been appointed as a director of the Issuer. Edelman & Guill Energy L.P. is the general partner of each of White Deer Energy L.P., White Deer Energy TE L.P. and White Deer Energy FI L.P. (collectively, the "Funds"), Edelman & Guill Energy Ltd. is the general partner of Edelman & Guill Energy L.P., and Messrs. Edelman and Guill are the directors of Edelman & Guill Energy Ltd. Accordingly, each of Edelman & Guill Energy Ltd., Edelman & Guill Energy L.P. and Messrs. Edelman and Guill may be deemed to control the decisions of the Funds. The Reporting Persons disclaim beneficial ownership of the reported securities except to the extent of their pecuniary interests therein, and this report shall not be deemed an admission that the reporting persons are the beneficial owners of these securities for purposes of Section 16 or for any other purpose.
F3Pursuant to a Securities Purchase Agreement dated August 1, 2012 between the Reporting Persons and the Issuer, the Reporting Persons acquired, among other securities of the Issuer, warrants to purchase an aggregate 3,076,923 shares of the Issuer's common stock. The Reporting Persons also acquired the right to receive additional warrants on each quarterly dividend payment date of the Issuer's Series A Preferred Stock on which dividends are not paid in cash but instead accrue. On March 31, 2015, one such date passed, and thus the Reporting Persons acquired an aggregate of 12,285 warrants on March 31, 2015.
F4Pursuant to a Securities Purchase Agreement dated December 17, 2012 between the Reporting Persons and the Issuer, the Reporting Persons acquired, among other securities of the Issuer, warrants to purchase an aggregate 4,577,464 shares of the Issuer's common stock. The Reporting Persons also acquired the right to receive additional warrants on each quarterly dividend payment date of the Issuer's Series A Preferred Stock on which dividends are not paid in cash but instead accrue. On March 31, 2015, one such date passed, and thus the Reporting Persons acquired an aggregate of 17,460 warrants on March 31, 2015.