6. Long-term debt

On March 21, 2017 (Closing Date), Verastem, Inc. (Borrower) entered into a term loan facility of up to $25.0 million (Term Loan) with Hercules Capital, Inc., a Maryland corporation (Hercules), the proceeds of which will be used for its ongoing research and development programs and for general corporate purposes. The Term Loan is governed by a loan and security agreement, dated March 21, 2017 (Loan Agreement), which provides for up to four separate advances subject to certain conditions of funding. The first tranche of $2.5 million was drawn on the Closing Date.

The Term Loan will mature on December 1, 2020 (Loan Maturity Date). Each advance accrues interest at a floating per annum rate equal to the greater of either (a) 10.5% or (b) the lesser of (i) 12.75% and (ii) the sum of (x) 10.5% plus (y) (A) the prime rate minus (B) 4.5%. As of June 30, 2017, the interest rate was 10.5%. The Term Loan provides for interest-only payments until November 1, 2018. The interest-only period may be extended to May 1, 2019 if the Borrower obtains minimum cash proceeds of $20.0 million from a sale of equity securities or subordinated debt and/or ongoing commercial partnerships. Thereafter, amortization payments will be payable monthly in twenty-six installments (or, if the period requiring interest-only payments has been extended to May 1, 2019, in twenty installments) of principal and interest (subject to recalculation upon a change in prime rates).

The Term Loan is secured by a lien on substantially all of the assets of the Borrower, other than intellectual property, and contains customary covenants and representations.

The Company assessed all terms and features of the Loan Agreement in order to identify any potential embedded features that would require bifurcation or any beneficial conversion features. As part of this analysis, the Company assessed the economic characteristics and risks of the Loan Agreement, including put and call features. The Company determined that all features of the Loan Agreement were clearly and closely associated with a debt host and did not require bifurcation as a derivative liability, or the fair value of the feature was immaterial to the Company's financial statements. The Company reassesses the features on a quarterly basis to determine if they require separate accounting.

The future principal payments under the Loan Agreement are as follows as of June 30, 2017 (in thousands):


Remainder of 2017	$	—
2018		146
2019		936
2020		1,418
Total	$	2,500