Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock, par value $0.001 per share^F2,F4,F5,F6	Aug 18, 2016	X	150,150	$27.25	A	580,206	I	See Footnotes
Common Stock, par value $0.001 per share^F2,F4,F5,F6	Aug 18, 2016	S	41,884	$97.69	D	538,322	I	See Footnotes
Common Stock, par value $0.001 per share^F3,F4,F5,F6	Aug 18, 2016	X	29,924	$27.25	A	156,224	I	See Footnotes
Common Stock, par value $0.001 per share^F3,F4,F5,F6	Aug 18, 2016	S	8,348	$97.69	D	147,876	I	See Footnotes
Common Stock, par value $0.001 per share^F1,F4,F5,F6	holding	—	—		—	70,036	I	See Footnotes
Common Stock, par value $0.001 per share^F4,F5,F6	holding	—	—		—	4,408	I	See Footnotes

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Warrants to purchase Common Stock^{F7,F2,F4,F5,F6}	$27.25	Aug 18, 2016	X	149,701	D	May 27, 2010	Nov 27, 2017	Common Stock	150,150	0	I
Warrants to purchase Common Stock^{F8,F3,F4,F5,F6}	$27.25	Aug 18, 2016	X	29,834	D	May 27, 2010	Nov 27, 2017	Common Stock	29,924	0	I

Explanation of responses

F1By Oak Hill Credit Opportunities Master Fund, Ltd. ("OHCOF").
F2By OHA Strategic Credit Master Fund, L.P. ("SCF"). OHA Strategic Credit GenPar, LLC is the general partner of SCF.
F3By OHA Strategic Credit Master Fund IB, L.P. ("SCF IB"). OHA Strategic Credit GenPar, LLC, is the general partner of SCF IB.
F4Oak Hill Advisors GenPar, L.P. ("OHA Genpar") is the general partner of Oak Hill Advisors, L.P. ("OHA"). OHA receives, directly and indirectly, management fees or incentive fees with respect to certain accounts that it advises, including OHCOF, SCF and SCF IB. None of such fees constitute an indirect pecuniary interest for purposes of Rule 16a-1. OHA also owns 4,408 shares of time-based restricted stock which are fully vested.
F5Glenn R. August controls (i) the managing general partner of OHA Genpar, and (ii) OHA Strategic Credit GenPar, LLC, the general partner of SCF and SCF IB, and may be deemed to have an indirect beneficial interest in the shares owned by OHCOF, SCF and SCF IB. Mr. August is a director of the Issuer.
F6Pursuant to Rule 16a-1 under the Exchange Act of 1934, as amended (the "Act"), the reporting persons shall be deemed to be the indirect beneficial owner of the securities beneficially owned by the entities listed in footnotes 1, 2, 3 and 4 only to the extent of their respective pecuniary interest. Pursuant to Rule 16a-1(a)(4) under the Act, this filing shall not be deemed an admission that the reporting persons are, for purposes of Section 16 of the Act or otherwise, the beneficial owners of any securities owned by the entities listed in footnotes 1, 2, 3 and 4, in each case except to the extent of such pecuniary interest.
F7On August 18, 2016, the reporting person exercised 149,701 warrants to purchase 150,150 shares of common stock for $27.25 per share. The reporting person paid the exercise price on a cashless basis, resulting in the issuer witholding 41,884 of the warrant shares to pay the exercise price and issuing to the reporting person the remaining 108,266 shares.
F8On August 18, 2016, the reporting person exercised 29,834 warrants to purchase 29,924 shares of common stock for $27.25 per share. The reporting person paid the exercise price on a cashless basis, resulting in the issuer witholding 8,348 of the warrant shares to pay the exercise price and issuing to the reporting person the remaining 21,576 shares.