DEBT

Credit facilities

On December 22, 2011, we entered into a $4.5 million revolving line of credit (“credit facility”) with Rosenthal & Rosenthal. The total loan amount available to us under the line of credit was equal to 85 percent of our net, eligible receivables, plus available inventory (50 percent of the lower of cost or market value of eligible inventory, or $250 thousand, whichever was less). The credit facility was secured by a lien on our domestic assets. The interest rate for borrowing on accounts receivable was 8.5 percent, on inventories 10 percent, and on overdrafts 13 percent. Additionally, there was an annual 1 percent facility fee on the entire $4.5 million amount of the credit facility payable at the beginning of the year. The agreement automatically renewed from year to year after December 31, 2014, unless we provided the requisite notice to Rosenthal. Additionally, Rosenthal had the right to terminate the agreement by providing 60 days written notice to us. We provided the required advance notice to Rosenthal, and as such, the facility was terminated in December 2015. We were required to comply with certain financial covenants, measured quarterly, including, as defined in the agreement: a tangible net worth amount and a working capital amount. We were in compliance with the financial covenants as of December 31, 2014. Borrowings under the revolving line of credit were $453 thousand at December 31, 2014, and are recorded in the Consolidated Balance Sheets as a current liability under the caption “Credit line borrowings.”

Borrowings

The components of our debt at December 31, 2014 are presented in the table below (in thousands):



	December 31,
	2014

Unsecured promissory note - Quercus Trust	$	70
Long-term debt	$	70

On June 1, 2009, we entered into a $70 thousand unsecured promissory note with Quercus Trust that bears interest in the amount of 1 percent per year. The principal and accrued interest on the note are due on June 1, 2109. In December 2015, we entered into an agreement with Quercus Trust to cancel the note and the accrued interest for a single payment of $13 thousand in cash. At the time of the cancellation, we had recorded $5 thousand in accrued interest on this note. For the year ended December 31, 2015, we recognized a gain of $62 thousand within "Other income" within the Consolidated Statements of Operations as a result of this cancellation.

Effective on March 31, 2014, the holders of the unsecured convertible notes converted the outstanding principal amount of $6.15 million into 2,671,739 shares of our common stock. As consideration for entering into agreements to convert their notes, the note holders received additional interest paid at the stated rate of the notes of 5 percent through September 30, 2014. At December 31, 2014, all of the additional interest had been paid to the note holders. In relation to the conversion of the outstanding notes, we incurred a one-time charge of $2.7 million, including a non-cash charge of $2.3 million to write-off the remaining unamortized discount associated with the notes, $154 thousand for the additional six months interest and $293 thousand to write-off the remaining loan origination costs incurred in connection with the convertible notes.