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	$0.32	Dec 31, 2015	J	6,085,487	A	Dec 31, 2015	Jun 30, 2023	Common Stock	6,085,487	6,085,487	I
Common Stock Warrants (right to buy)^F1,F2	$0.32	Dec 31, 2015	J	202,778	A	Dec 31, 2015	Jun 30, 2023	Common Stock	202,778	202,778	I
Common Stock Warrants (right to buy)^F1,F2	$0.32	Dec 31, 2015	J	217,959	A	Dec 31, 2015	Jun 30, 2023	Common Stock	217,959	217,959	I
Common Stock Warrants (right to buy)^F3,F2	$19.50	Dec 31, 2015	J	12,557	A	Dec 31, 2015	Jun 30, 2023	Common Stock	12,557	12,557	I
Common Stock Warrants (right to buy)^F3,F2	$19.50	Dec 31, 2015	J	418	A	Dec 31, 2015	Jun 30, 2023	Common Stock	418	418	I
Common Stock Warrants (right to buy)^F3,F2	$19.50	Dec 31, 2015	J	450	A	Dec 31, 2015	Jun 30, 2023	Common Stock	450	450	I
Common Stock Warrants (right to buy)^F4,F2	$14.20	Dec 31, 2015	J	17,847	A	Dec 31, 2015	Jun 30, 2023	Common Stock	17,847	17,847	I
Common Stock Warrants (right to buy)^F4,F2	$14.20	Dec 31, 2015	J	593	A	Dec 31, 2015	Jun 30, 2023	Common Stock	593	593	I
Common Stock Warrants (right to buy)^F4,F2	$14.20	Dec 31, 2015	J	639	A	Dec 31, 2015	Jun 30, 2023	Common Stock	639	639	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 December 31, 2015, one such date passed, and thus the Reporting Persons acquired an aggregate of 6,506,224 warrants on December 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 December 31, 2015, one such date passed, and thus the Reporting Persons acquired an aggregate of 13,425 warrants on December 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 December 31, 2015, one such date passed, and thus the Reporting Persons acquired an aggregate of 19,079 warrants on December 31, 2015.