Note 7. Debt

Debt at June 30, 2017, consisted of the following (in thousands):

	June 30, 2017
	Principal			Unamortized Discount			Total
Loan and Security Agreement	$	17,631		$	(169	)	$	17,462
Less: debt - current		(5,674	)		126			(5,548	)
Debt - non-current	$	11,957		$	(43	)	$	11,914

Debt at December 31, 2016, consisted of the following (in thousands):

	December 31, 2016
	Principal			Unamortized Discount			Net Carrying Value
Loan and Security Agreement	$	19,499		$	(124	)	$	19,375
Less: debt - current		(7,013	)		79			(6,934	)
Debt - non-current	$	12,486		$	(45	)	$	12,441

Principal and interest payments on debt at June 30, 2017, are expected to be as follows (in thousands):

Year ended December 31,	Principal		Interest		Total
2017	$	—	$	615	$	615
2018		11,548		866		12,414
2019		6,083		1,524		7,607
Total	$	17,631	$	3,005	$	20,636

Loan and Security Agreement

On June 30, 2014, the Company entered into a five year loan and security agreement with Oxford Finance LLC (the “Term Loan Agreement”) to borrow up to $30.0 million in term loans in three equal tranches (the “Term Loans”). On June 30, 2014, the Company received $10.0 million from the first tranche (“Term Loan A”). The second tranche of $10.0 million (“Term Loan B”) was drawn on June 15, 2015. Term Loan A bore an interest rate of 6.95%. Term Loan B bore an interest rate of 7.01%. Term Loans A and B were set to mature on June 1, 2019.

On September 29, 2015, the Term Loan Agreement was amended to extend (i) the period in which the third tranche could have been drawn and (ii) the interest-only period for all advances under the Term Loan Agreement. The Company was required to make interest only payments through June 2016, followed by thirty-six months of equal principal and interest payments thereafter. On July 28, 2016, the Term Loan Agreement was amended to include an additional interest-only period for all advances under the Term Loan Agreement. As amended, the Company was required to make interest only payments from August 2016 through January 2017, followed by twenty-nine months of equal principal and interest payments thereafter. On April 27, 2017, the Term Loan Agreement was amended to include an additional interest-only period for all advances under the Term Loan Agreement. As amended, the Company was required to make interest only payments from May 2017 through December 2017, followed by eighteen months of equal principal and interest payments thereafter. The Company determined that these amendments to the Term Loan Agreement resulted in debt modifications. As a result, the accounting treatment for the Term Loan continues under the interest method, with a new effective interest rate based on revised cash flows calculated on a prospective basis upon the execution of each of these amendments to the Term Loan Agreement. The Company was also required to make a final payment equal to 7% of the principal amounts of the Term Loans drawn payable on the earlier to occur of maturity or prepayment. The costs associated with the final payment are recognized as interest expense over the life of the Term Loans. The Company could prepay at any time the Term Loans subject to declining prepayment fees over the term of the Term Loan Agreement. The Company pledged all current and future assets, excluding its intellectual property and 35% of the Company’s investment in its subsidiary, Cerus Europe B.V., as security for borrowings under the Term Loan Agreement. The Term Loan Agreement contained certain nonfinancial covenants, with which the Company was in compliance at June 30, 2017. As discussed in Note 14, on July 31, 2017, the Company entered into the five year Amended and Restated Loan and Security Agreement with Oxford Finance LLC to borrow up to $40.0 million in term loans in two tranches.