Debt	3 Months Ended
Mar. 31, 2019
Debt Disclosure [Abstract]
Debt	NOTE 5 — DEBT Loan and security agreement On January 16, 2015, the Company entered into a Loan and Security Agreement (as amended, the “Loan Agreement”) with Oxford Finance LLC (“Oxford”) and Silicon Valley Bank (“SVB” and, together with Oxford, the “Lenders”), providing for term loans to the Company in an aggregate principal amount of up to $15 million, in two tranches (the “Term Loans”). The Company drew down the initial Term Loans in the aggregate principal amount of $10 million (the “Term A Loans”), on January 16, 2015. The Term A Loans bore interest at a fixed rate of 7.05% per annum. The Company believes that the Company's debt obligations accrued interest at rates which approximated prevailing market rates for instruments with similar characteristics and, accordingly, the carrying values for these instruments approximated fair value. The Company paid a facility fee at the time of borrowing of $75 thousand for access to the Term Loans and paid a final payment of $510 thousand in August 2018, representing 5.1% of the total amount borrowed, which has been included as a component of the debt discount and was amortized to interest expense over the term of the loans. The Term Loans matured on August 1, 2018 and the Company made a final repayment in the amount of $510 thousand on such date. As of March 31, 2019, the Company had no borrowings outstanding under the Term Loans. For the three months ended March 31, 2019 and 2018, the Company recognized interest expense of zero and $0.1 million respectively, including zero and $24 thousand, respectively, related to the debt discount.

Debt

3 Months Ended

Mar. 31, 2019

NOTE 5 — DEBT

Loan and security agreement

On January 16, 2015, the Company entered into a Loan and Security Agreement (as amended, the “Loan Agreement”) with Oxford Finance LLC (“Oxford”) and Silicon Valley Bank (“SVB” and, together with Oxford, the “Lenders”), providing for term loans to the Company in an aggregate principal amount of up to $15 million, in two tranches (the “Term Loans”).

The Company drew down the initial Term Loans in the aggregate principal amount of $10 million (the “Term A Loans”), on January 16, 2015. The Term A Loans bore interest at a fixed rate of 7.05% per annum. The Company believes that the Company's debt obligations accrued interest at rates which approximated prevailing market rates for instruments with similar characteristics and, accordingly, the carrying values for these instruments approximated fair value.

The Company paid a facility fee at the time of borrowing of $75 thousand for access to the Term Loans and paid a final payment of $510 thousand in August 2018, representing 5.1% of the total amount borrowed, which has been included as a component of the debt discount and was amortized to interest expense over the term of the loans. The Term Loans matured on August 1, 2018 and the Company made a final repayment in the amount of $510 thousand on such date. As of March 31, 2019, the Company had no borrowings outstanding under the Term Loans.

For the three months ended March 31, 2019 and 2018, the Company recognized interest expense of zero and $0.1 million respectively, including zero and $24 thousand, respectively, related to the debt discount.