Annual report pursuant to Section 13 and 15(d)

BRIDGE LOANS, MEMBER LOAN AND CONVERTIBLE DEBT

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BRIDGE LOANS, MEMBER LOAN AND CONVERTIBLE DEBT
12 Months Ended
Dec. 31, 2015
Debt Disclosure [Abstract]  
BRIDGE LOANS, MEMBER LOAN AND CONVERTIBLE DEBT
BRIDGE LOANS, MEMBER LOAN AND CONVERTIBLE DEBT
Senior Convertible Note
We entered into a securities purchase agreement on June 17, 2013 for the sale to multiple investors of $7.0 million in principal amount of senior secured convertible promissory notes, which we refer to as Senior Convertible Notes. MDB served as placement agent in this financing. We closed the sale on the same day and issued $7.0 million in principal amount of Senior Convertible Notes. We also paid $700,000 to MDB as a placement agent fee. The net cash proceeds were $6.3 million. We also issued to MDB a warrant to purchase shares of our common stock as consideration for its financing services, and another warrant to purchase shares of our common stock as consideration for business consulting services. The Senior Convertible Notes bore interest at a 6% per annum and were scheduled to mature on September 17, 2014 unless earlier converted.
The conversion feature included in the terms of the Senior Convertible Notes was determined to be a derivative liability that we bifurcated for accounting purposes. We measured the derivative liability at fair value at the issue date of Senior Convertible Notes based on a Monte Carlo option-pricing model and determined the value to be $1.9 million. The derivative liability was recorded with a corresponding debit to debt discount that was amortized as interest expense using the effective interest method over the life of the instrument. At the time of issuance, the Senior Convertible Notes and derivative liability were recorded on the balance sheet as a long-term note because the notes mature on September 17, 2014 (greater than one year). Upon a Qualified IPO, or other event that results in the conversion of the notes into common stock, a portion of the carrying value of the derivative liability would be accounted for as an extinguishment of debt and any remaining unamortized debt discount would be expensed at such date. At December 31, 2013, the Monte Carlo option-pricing model used the following assumptions to estimate fair value: equity value of $20.0 million, different conversion prices for different scenarios, time to maturity of 9-15 months under the scenarios based on the expected date of a Qualified IPO, volatility of 102.1% and risk free rate of 0.19%. As noted above, in connection with the Senior Convertible Notes and as a result of the warrants issued to MDB as consideration for its placement agent services, we determined that an additional discount to the debt should be recorded in the amount of $300,000, and we were amortizing this amount using the effective interest method over the life of the instrument. The Senior Convertible Notes did not include any financial covenants.
Upon the completion of the IPO, which was considered a Qualified IPO under the Senior Convertible Note agreement, the Senior Convertible Notes were converted into 2,087,667 shares of common stock as of the date of the IPO and unpaid interest of $404,000 was paid from the proceeds of the IPO. Additionally, the unamortized debt discount of $780,000 was fully amortized to interest expense for the year ended December 31, 2014.   Interest expense, excluding the unamortized debt discount write-off, was $728,000 for year ended December 31, 2014.
Subordinated Convertible Note
On June 17, 2013, we issued to STI a subordinated senior secured convertible note in the principal amount $2.4 million, which we refer to as the Subordinated Convertible Note, as consideration for our acquisition from STI of its 300,000 Class C units of Resonant LLC and 100 shares of our common stock. The Subordinate Convertible Note did not bear interest and was scheduled to mature on September 17, 2014 unless earlier converted.
The Subordinated Convertible Note was non-interest bearing. We considered the effective interest rate of the Subordinated Convertible Note to be at least 11.8% per annum as the Subordinated Convertible Note was subordinated to the Senior Convertible Notes and had greater inherent risk, and, therefore, it should carry a higher interest rate than that of the Senior Convertible Notes. We calculated a discount to the face value of the Subordinated Convertible Note of $300,000, which we recorded as debt discount and were amortizing as interest expense over the life of the Subordinated Convertible Note using the effective interest rate method. The Subordinated Convertible Note did not include any financial covenants.
Upon the completion of the IPO, which was considered a Qualified IPO under the Subordinated Convertible Note agreement, the Subordinated Convertible Note was converted into 700,000 shares of common stock as of the date of the IPO and there was no unpaid interest. Additionally, the unamortized debt discount of $61,000 was fully amortized to interest expense for the year ended December 31, 2014. Interest expense, excluding the unamortized debt discount write-off, was $90,000 for the year ended December 31, 2014.