INDEBTEDNESS

Convertible Senior Notes

In December 2014, we issued $143.8 million of our Convertible Senior Notes due 2019 (the “Notes”) in a registered public offering. The Notes pay 3.0% interest semi-annually in arrears starting on June 1, 2015 and are due December 1, 2019. The initial conversion price was $69.48 per share. Simultaneous with the issuance of the Notes, we entered into “bond hedge” (or purchased call) and “warrant” (or written call) transactions with an affiliate of one of the offering underwriters in order to synthetically raise the initial conversion price of the Notes to $96.21 per share and reduce the potential common stock dilution that may arise from the conversion of the Notes.

The Notes are convertible at the option of the holder under certain circumstances and upon conversion we may elect to settle such conversion in shares of our common stock, cash, or a combination thereof. As a result of our cash conversion option, we separately accounted for the value of the embedded conversion option as a debt discount (with an offset to APIC) of $33.6 million. Deferred financing costs are recorded as a reduction of long-term debt in the consolidated balance sheets and are being amortized as additional non-cash interest expense on a straight-line basis over the term of the debt, since this method was not significantly different from the effective interest method.

The carrying value of the Notes is as follows as of:

(in thousands)	June 30, 2017		December 31, 2016
Principal amount	$	143,750	$	143,750
Unamortized debt discount		(17,328)		(20,644)
Deferred financing costs		(2,041)		(2,463)
Net carrying value	$	124,381	$	120,643

We had accrued interest of $0.4 million related to the Notes recorded in accrued expenses, other in our consolidated balance sheets at both June 30, 2017 and December 31, 2016.

The following table sets forth the components of total interest expense related to the Notes recognized in the accompanying unaudited interim condensed consolidated statements of earnings for the three and six months ended June 30, 2017 and 2016:

	Three Months Ended				Six Months Ended
(in thousands)	June 30, 2017		June 30, 2016		June 30, 2017		June 30, 2016
Contractual coupon	$	1,078	$	1,078	$	2,156	$	2,156
Amortization of debt discount		1,668		1,582		3,315		3,144
Amortization of finance fees		211		211		422		422
Capitalized interest		(134)		(54)		(224)		(100)
	$	2,823	$	2,817	$	5,669	$	5,622

As of June 30, 2017, the effective interest rate on the Notes was 7.9%, on an annualized basis.

Line of Credit

In May 2016, we entered into a credit arrangement (the “Line of Credit”) with Citizens Bank Capital, a division of Citizens Asset Finance, Inc. (the “Citizens Agreement”). The Citizens Agreement provides for a $30.0 million asset-based revolving credit loan facility, with availability subject to a borrowing base consisting of eligible accounts receivable and inventory and the satisfaction of conditions precedent specified in the Citizens Agreement. The Citizens Agreement provides for an accordion feature, whereby we may increase the revolving commitment up to an additional $10.0 million subject to certain terms and conditions. The Citizens Agreement matures on May 12, 2019, at which time all amounts outstanding will be due and payable. Amounts drawn bear an interest rate equal to, at our option, either a LIBOR rate plus 1.25%, 1.50%, or 1.75% per annum, depending upon availability under the Citizens Agreement, or an alternative base rate plus either 0.25%, 0.50%, or 0.75% per annum, depending upon availability under the Citizens Agreement. We incur a commitment fee on undrawn amounts equal to 0.25% per annum.

In February 2017, we drew down $30.0 million on the Line of Credit. As part of the draw down, we implemented the accordion feature and increased the Line of Credit to $40.0 million. As of June 30, 2017, we had a $30.0 million outstanding balance on the Line of Credit. In the second quarter of 2016, we deferred $0.3 million of debt issuance costs related to the Line of Credit, which are being amortized over the three year life of the Line of Credit. The $0.2 million net balance of deferred debt issuance costs is included in prepaid expenses and other current assets in the accompanying unaudited interim condensed consolidated balance sheet at June 30, 2017. During the three and six months ended June 30, 2017, we recorded $0.2 million and $0.3 million of interest expense related to the Line of Credit, respectively.