14.	Stockholders’ Equity

Preferred Stock

We have authorized 5 million shares of $0.001 par value preferred stock. Our Board of Directors is authorized to designate the terms and conditions of any preferred stock we issue without further action by the common stockholders. There were 13,500 shares of Series A 3.6% Convertible Preferred Stock issued at December 31, 2015 and December 31, 2014 and 0 and 5,311 shares outstanding as of December 31, 2015 and December 31, 2014, respectively.

In October 2014, we entered into a Securities Purchase Agreement with certain institutional investors pursuant to which the Company sold a total of 13,500 units for a purchase price of $1,000 per unit, with each unit consisting of one share of the Company’s Series A 3.6% Convertible Preferred Stock, which are convertible into shares of the Company’s common stock with a conversion price of $0.52, and warrants to purchase up to a number of shares of common stock equal to 100% of the conversion shares under the shares of preferred stock, in a registered direct offering. The preferred stock and the warrants were immediately separable and were issued separately. As of December 31, 2015, all outstanding Series A 3.6% Convertible Preferred Stock had been converted into shares of common stock.

We recorded a dividend of $1.2 million for the year ended December 31, 2014, related to a beneficial conversion feature included in the issuance of our Series A 3.6% Convertible Preferred Stock. The fair value of the common stock into which the Series A 3.6% Convertible Preferred Stock was convertible on the date of issuance exceeded the proceeds allocated to the preferred stock, resulting in the beneficial conversion feature that we recognized as a dividend to the preferred shareholders and, accordingly, an adjustment to net loss to arrive at net loss allocable to common shareholders. Certain shares of Series A 3.6% Convertible Preferred Stock were not convertible until shareholder approval, which occurred in January 2015. As a result, additional dividends for the beneficial conversion feature of $0.7 million were recorded during the quarter ended March 31, 2015.

In connection with the 3.6% Convertible Preferred Stock outstanding at December 31, 2014, we declared a cash dividend of $0.07 million. The cash dividend was paid in January 2015.

Common Stock

In January 2013, the underwriter exercised this option and as a result we sold an additional 1,053,000 shares raising approximately $3,000,000 in gross proceeds before deducting underwriting discounts and commissions and other offering expenses payable by us.

In October 2013, we entered into a Common Stock Purchase Agreement with Lorem Vascular for the purchase of 8,000,000 shares at $3.00 per share. The transaction occurred in two separate closings of 4,000,000 shares each. The first closing occurred in November 2013, and the second closing occurred in January 2014. As of December 31, 2013, we received $15,000,000 of the gross proceeds, $12,000,000 for the first closing and $3,000,000 towards the second closing. The balance of $9,000,000 in gross proceeds required to complete the second closing was received in January 2014. In connection with the Common Stock Purchase Agreement, the right to a one time appointment of one member of our Board of Directors was granted to Mr. K.T. Lim, Chairman of Lorem Vascular. Mr. Lim exercised his right to appoint a member to serve on our Board of Directors in June 2014, and Mr. Lim’s appointee, Mr. Ruud Jona, subsequently resigned his appointment to the Board of Directors in July 2014.

In May 2014, we and 47 holders of warrants to purchase a total of 3,156,238 shares of the Company’s common stock, issued in a private offering in May 2009, agreed to extend the expiration date of the warrants from May 14, 2014 to May 14, 2015 and increase the exercise price of the warrants from $2.62 per share to $3.50 per share pursuant to an Amendment to Warrant to Purchase Common Stock. One holder of warrants did not agree to the Amendment, and their warrants, covering 38,500 shares of Common Stock, expired unexercised on May 14, 2014 in accordance with the original terms.

In May 2014, we entered into subscription agreements with certain institutional investors pursuant to which we sold a total of 4,048,584 units, with each unit consisting of one share of common stock and one warrant to purchase one share of common stock at a purchase price of $2.47 per unit, in a registered direct offering. Each warrant had an exercise price of $3.00 per share, was exercisable immediately after issuance and expires five years from the date of issuance. The transaction was completed on June 4, 2014 raising approximately $10,000,000 in gross proceeds before deducting any offering expenses or fees payable by us. Under the terms of our Placement Agent Agreement, we granted WBB Securities, LLC warrants to purchase 202,429 shares of common stock. The placement agent warrants have the same terms as the warrants issued to the purchasers in the offering, except that such warrants have an exercise price of $3.09.

In September 2014, the Company and 13 holders of warrants dated June 4, 2014 to purchase a total of 4 million shares of the Company’s common stock agreed to amend the warrants in order to reduce the exercise price from $3.00 per share to $1.00 per share and change the expiration date from June 4, 2019 to September 10, 2014. The Company received proceeds of approximately $4 million from the exercise of the warrants. In addition, pursuant to the terms of the amendment, upon each holder’s exercise of all shares for cash prior to the amended expiration date, the Company issued additional warrants for the same number of common shares to the holders. The additional warrants have an exercise price of $2.00 per share, and are exercisable during the period commencing on the date that is six months and one day from the date of issuance and expiring five years from the date of issuance. For those investors participating in the October 2014 issuance of Series A 3.6% Convertible Preferred Stock, we agreed to reduce the exercise price of 3.4 million warrants held by such investors from $2.00 per share to $0.5771 per share, conditioned upon stockholder approval which was obtained in January 2015. As of December 31, 2015, all 3.4 million warrants had been exercised, some via cash and others on a cashless basis resulting in the issuance of an aggregate of 1.8 million shares of Common Stock, and receipt by the Company of $0.1 million in net proceeds.

In October 2014, the Company entered into a Securities Purchase Agreement with certain institutional investors pursuant to which it issued common stock purchase warrants to the institutional investors with certain exercise price reset features. Each warrant had an initial exercise price of $0.5771 per share, and is exercisable during the period commencing six months and one day after the date of issuance and expiring five years from the date on which it is initially exercisable. Pursuant to the second closing of the May 2015 Securities Purchase Agreement, the exercise price of these warrants was reset to $0.3263. During the second quarter of 2015, approximately 8.5 million of the October 2014 warrants were exercised for cash at $0.5771 per share for net proceeds of $4.9 million. In December 2015, all the remaining outstanding October Warrants were cashless exercised.

In May 2015, the Company entered into a Securities Purchase Agreement with certain institutional investors pursuant to which the Company agreed to sell up to $25 million of units, with each unit consisting of one share of its common stock and one warrant to purchase one share of its common stock, in a registered direct offering. The purchase and sale of the units is took place in two separate closings. At the initial closing, which took place on May 8, 2015, the Company received approximately $17.4 million in net proceeds from the sale of units. The purchase price for each unit sold at the initial closing was $0.77. Each warrant issued as part of the units at the initial closing has an initial exercise price of $1.02 per share, and is exercisable during the period commencing six months and one day after the date of issuance and expiring five years from the date on which it is initially exercisable. The second closing of the purchase and sale of the units occurred on August 27, 2015 upon satisfaction of certain conditions, including, without limitation, stockholder vote, and the Company received approximately $2.1 million in net proceeds from the sale of 7,499,993 units of the 14,999,993 units available for sale at the second closing. The purchase price for each unit sold at the second closing was $0.3263 and each warrant issued has an initial exercise price of $0.401 and expire five years from the date of issuance.

On December 17, 2015, the Company and the holders of October 2014 warrants agreed to amend the October 2014 Warrants pursuant to an Amendment to Common Stock Purchase Warrant (the “2014 Amendment”). Also on December 17, 2015, the Company and the holders of the May 2015 Warrants and the August 2015 Warrants (collectively the “2015 Warrants”) agreed to amend the 2015 Warrants pursuant to an Amendment to Series A-1 Warrant to Purchase Common Stock and Amendment to Series A-2 Warrant to Purchase Common Stock, respectively (the “2015 Amendment” and, together with the 2014 Amendment, the “Warrant Amendments”). The Warrant Amendments provide that the holders may exercise their warrants on a “cashless exercise” basis in whole on or prior to December 31, 2015, whereby each exercising holder of the amended 2015 Warrants would receive 0.75 shares for each warrants share exercised and each exercising holder of the amended 2014 Warrants would 0.69 shares for each warrant share exercised. In addition, the Warrant Amendments removed certain provisions which provided that the exercise price of the Warrants would be reset in the event of certain equity issuances by the Company for a price below the exercise price of the Warrants as of the time of such issuance. All 2014 Warrants and all 2015 Warrants were cashless exercised on or before December 31, 2015.

Also on December 17, 2015, the Company entered into Amendment One to the Securities Purchase Agreement between the Company and certain institutional investors dated May 5, 2015 (the “SPA Amendment”). The SPA Amendment provides that, among other things, the Company will not to conduct any offering of its equity securities, including through its “at-the-market offering” program, until February 5, 2016, subject to certain limited exceptions.