5. Notes Payable

Loan and Security Agreement

In September 2012, the Company entered into the Agreement with MidCap Financial, providing for the borrowing of up to $15 million, of which $10 million was required to be drawn. The remaining $5 million may be drawn at the option of the Company. The Agreement provides for the loan to be issued in three tranches: the first tranche of $5 million was issued in September 2012; the second tranche of $5 million was issued in December 2012; and, prior to the amendment described below, the final tranche could have been drawn at the option of the Company no later than June 2013. The loan has a monthly variable interest rate, reset each month, if applicable, as determined by adding to 600 basis points the greater of: (a) one month LIBOR or (b) 3% (the LIBOR floor). Interest on amounts outstanding are payable monthly in arrears. There is an interest only period to December 31, 2013 followed by straight-line principal payments over thirty-six months until December 31, 2016. At the time of final payment, the Company must pay an exit fee of 3% of the drawn amount. Pursuant to the Agreement, the Company provided a first priority security interest in all existing and after-acquired assets, excluding intellectual property. In addition, the terms of the Agreement provided MidCap Financial a warrant to purchase shares of the Company’s Series E convertible preferred stock (Series E Preferred) equal to 4% of the amount drawn down under the facility divided by the Series E Preferred exercise price of $12.11 per share. The warrant expired upon the completion of the Company’s IPO.

The Company has the right to prepay all or a portion of the borrowed amounts under the Agreement; however, if the Company exercises this option, the Company must pay a prepayment fee determined by multiplying the outstanding loan amount by 5% if the prepayment occurs on or before December 31, 2014, 2% if the prepayment occurs in 2015 and 1% if the prepayment occurs in the final year. In the event of default, upon which all amounts borrowed become immediately due and payable, the Company will be subject to the prepayment fee. An event of default includes, but is not limited to, an occurrence such as a payment default, a material adverse change, insolvency, or a change of control.

In connection with the Agreement and the first tranche draw down of $5 million in September 2012 and second tranche draw down of $5 million in December 2012, the Company issued a warrant to MidCap Financial to purchase shares of the Company’s Series E Preferred. Contemporaneously with the issuance of the warrant, the Company recorded a debt discount of $79,000.

Debt issuance costs paid directly to MidCap Financial of $114,000 (financing fees) and the fair value of the warrant issued to MidCap Financial were treated as a discount on the debt and are being accreted using the interest method. Other debt issuance costs for legal fees are included in other assets in the accompanying consolidated balance sheet and are being amortized using the interest method. The accretion of the debt discount and amortization of other debt issuance costs are recorded as non-cash interest expense in the consolidated statements of comprehensive loss.

In June 2013, the Company entered into the Amendment to extend the draw down date for the final tranche of $5.0 million from June 2013 to May 2014. In addition, the final tranche was changed from an optional draw down to a required draw down. In connection with the Amendment, the Company issued a warrant to purchase up to 49,548 shares of the Company’s common stock with an exercise price of $12.11 per share. The warrant expires on the tenth anniversary of its issuance date. The warrants issued to Midcap Financial had an initial fair value of $130,000, which represent financing fees, and are included in other assets in the accompanying consolidated balance sheet and are being amortized as non-cash interest expense over the remaining term of the Agreement using the effective interest method. The Company estimated the fair values of these warrants using the Black-Scholes option-pricing model, based on the inputs for the estimated fair value of the underlying common stock at the valuation measurement date, the contractual term of the warrant, risk-free interest rates, expected dividend rates and expected volatility of the price of the underlying common stock.

The Company recorded interest expense related to the borrowings of $807,000 for the nine months ended September 30, 2013. Included in interest expense for this period was interest on principal, amortization of the debt issuance costs, accretion of debt discount, and the accretion of the final exit fee. For the nine months ended September 30, 2013, the effective interest rate on the amounts borrowed under the Agreement, including the accretion of the debt discount and the accretion of the final payment, was 10%.

Future payments as of September 30, 2013 for balances outstanding under the Agreement are as follows (in thousands):


Remainder of 2013	$	575
2014		3,995
2015		3,699
2016		3,403

Total minimum payments		11,672
Less amount representing interest		(1,672	)

Notes payable, gross		10,000
Discount on notes payable		(135	)
Accretion of the final exit fee payment		67

		9,932
Less short-term portion of notes payable		(2,383	)

Long-term notes payable	$	7,549