4.	Long-term Debt

Baxalta

In June 2015, we entered into the First Amendment, or the Pacritinib License Amendment, to the Development, Commercialization and License Agreement, or the Original Pacritinib License Agreement, dated as of November 14, 2013, with Baxter International Inc., or Baxter. Baxalta Incorporated and its affiliates, or Baxalta, have been assigned Baxter’s rights and obligations under the Original Pacritinib License Agreement. Pursuant to the Pacritinib License Amendment, two potential milestone payments in the aggregate amount of $32.0 million from Baxalta to us were accelerated from the schedule contemplated by the Original Pacritinib License Agreement relating to the following: the $12.0 million development milestone payment payable in connection with the regulatory submission to the EMA with respect to pacritinib, or the EMA Milestone, and the $20.0 million development milestone payment payable in connection with the first treatment dosing of the last patient enrolled in PERSIST-2, or the PERSIST-2 Milestone. Under the Pacritinib License Amendment, each of the two milestone advances bears interest at an annual rate of 9% percent until the earlier of the date of the first occurrence of the respective milestone or the date that the respective advance plus accrued interest is repaid in full.

In the event that pacritinib development is terminated due to certain specified reasons or the milestones are not achieved by respective deadlines (December 31, 2016 for the PERSIST-2 Milestone and March 31, 2017 for the EMA Milestone), we would be required to repay the respective advance to Baxalta in eight quarterly installments of $1.5 million relating to the EMA Milestone and $2.5 million relating to the PERSIST-2 Milestone, in each case beginning 30 days after the end of the calendar quarter of the first occurrence of such event, and a final payment equal to the remainder of the unpaid balance. Repayment of the advances will be accelerated in the event of the commencement of insolvency proceedings and certain other events of default. If a milestone is achieved, however, then we would remain entitled to the respective milestone payments. Additionally, in the event that we do not spend a specified amount on the development of pacritinib from the date of the amendment through February 29, 2016, payments to Baxalta in an amount equal to such deficiency may be required or credited against amounts owed to us under certain circumstances. In connection with this advance, we recorded debt issuance costs of $0.1 million. As of September 30, 2015, the outstanding balance of such advance was $32.0 million, and the unamortized issuance costs were $0.1 million.

Hercules

In June 2015, we entered into the Third Amendment, or the Third Amendment, to the Loan and Security Agreement, or the Loan Agreement, with Hercules Technology Growth Capital, Inc. and certain affiliates, or collectively, Hercules. Under the Third Amendment, Hercules agreed to provide term loans in an aggregate principal amount of up to $25.0 million, inclusive of the principal balance outstanding immediately prior to closing of the Third Amendment of $13.8 million, or collectively, the Term Loan Borrowings. We drew $6.2 million upon closing of the Third Amendment, resulting in a then-outstanding principal balance of $20.0 million under the Term Loan Borrowings. The remaining $5.0 million is available for borrowing at our option through June 30, 2016, subject to certain conditions. In connection with the Third Amendment, we paid a commitment fee of $15,000 and a facility charge of $0.3 million. The provision under the Loan Agreement requiring us to pay a fee to Hercules of $1.3 million on the date of repayment of the borrowings thereunder was amended pursuant to the Third Amendment, such that the fee will now be payable on the earliest to occur of (1) October 1, 2016, (2) the date on which the Term Loan Borrowings are prepaid in full or (3) the date on which the Term Loan Borrowings become due and payable in full.

The interest rate on the Term Loan Borrowings floats at a rate per annum equal to 10.95% plus the amount by which the prime rate exceeds 3.25%. We are initially required to make interest payments only on a monthly basis, followed by the 36 equal monthly installments of principal and interest (mortgage style) commencing on January 1, 2016. The interest-only period may be extended by up to six months at our option if we achieve certain milestones by certain specified deadlines. We may elect to prepay some or all of the Term Loan Borrowings at any time subject to a prepayment fee, if any, pursuant to the terms of the Third Amendment. Under certain circumstances, we may be required to prepay the Term Loan Borrowings with proceeds of asset dispositions. The Term Loan Borrowings are secured by a first priority security interest on substantially all of our personal property except our intellectual property and subject to certain other exceptions.

In connection with the Third Amendment, we issued a warrant to Hercules to purchase shares of common stock. The warrant is exercisable for five years from the date of issuance for 0.3 million shares of common stock at an initial exercise price is $1.71 per share. The exercise price is subject to adjustment if, within six months after closing of the Third Amendment, we issue shares of common stock or securities that are exercisable or convertible into shares of common stock in transactions not registered under the Securities Act of 1933, as amended, under certain circumstances at an effective price per share of common stock that is less than the then-effective exercise price of the warrant. In such case, the exercise price shall automatically be reduced to equal the price per share of common stock in such transaction. The exercise price under the warrant and the number of shares for which the warrant is exercisable are each subject to certain customary adjustments as set forth in the agreement representing the warrant. Since the warrant does not meet the considerations necessary for equity classification under the applicable authoritative guidance, we determined the warrant is a liability instrument that is marked to fair value with changes in fair value recognized through earnings at each reporting period. The warrant is categorized as Level 2 in the fair value hierarchy as the significant inputs used in determining fair value are considered observable market data. As of the issuance date and September 30, 2015, we estimate the fair value of the warrant to be $0.4 million and $0.2 million, respectively.

The modified terms under the Third Amendment are considered substantially different as compared to the terms of the Loan Agreement immediately prior to the Third Amendment, pursuant to ASC 470-50, Modification and Extinguishment. As such, the Third Amendment was accounted for as a debt extinguishment, resulting in a loss on debt extinguishment of $1.2 million which is included in other non-operating expense.

As of September 30, 2015 and December 31, 2014, the outstanding principal balance under our Loan Agreement, as amended by the Third Amendment, was $20.0 million and $18.5 million, unamortized debt discount was $0.3 million and $1.1 million, and unamortized issuance costs were $0.1 million and $0.2 million, respectively.