In March 2015, MT, our previously wholly-owned subsidiary, entered into a Securities Purchase Agreement to sell up to 50 shares of its Series A Convertible Preferred Stock (MT Preferred Stock) and warrants to purchase up to 1,500 common shares of MT (MT Common Stock) to Platinum and Dr. Michael Goldberg (collectively, the Investors) for a purchase price of $50,000 per unit.  A unit consists of one share of MT Preferred Stock and 30 warrants to purchase MT Common Stock.  Under the agreement, 40% of the MT Preferred Stock and warrants are committed to be purchased by Dr. Goldberg, and the balance by Platinum.  The full 50 shares of MT Preferred Stock and warrants that may be sold under the agreement are convertible into, and exercisable for, MT Common Stock representing an aggregate 1% interest on a fully converted and exercised basis.  Navidea owns the remainder of the MT Common Stock.  On March 11, 2015, definitive agreements with the Investors were signed for the sale of the first 10 shares of MT Preferred Stock and warrants to purchase 300 shares of MT Common Stock to the Investors, with gross proceeds to MT of $500,000.  The MT Common Stock held by parties other than Navidea is reflected on the consolidated balance sheets as a noncontrolling interest.

The warrants have certain characteristics including a net settlement provision that require the warrants to be accounted for as a derivative liability at fair value, with subsequent changes in fair value included in earnings.  The fair value of the warrants was estimated to be $63,000 at issuance and at December 31, 2015.  See Notes 1(m) and 3.  In addition, the MT Preferred Stock includes a beneficial conversion feature.  The conversion option was immediately convertible upon issuance, resulting in a deemed dividend of $46,000 related to the beneficial conversion feature.  Finally, certain provisions of the Securities Purchase Agreement obligate the Investors to acquire the remaining MT Preferred Stock and related warrants for $2.0 million at the option of MT.  The estimated relative fair value of this put option was $113,000 at issuance based on the Black-Scholes option pricing model and is classified within stockholders' equity.

In addition, we entered into a Securities Exchange Agreement with the Investors providing them an option to exchange their MT Preferred Stock for our common stock in the event that MT has not completed a public offering with gross proceeds to MT of at least $50 million by the second anniversary of the closing of the initial sale of MT Preferred Stock, at an exchange rate per share obtained by dividing $50,000 by the greater of (i) 80% of the twenty-day volume weighted average price per share of our common stock on the second anniversary of the initial closing or (ii) $3.00.  To the extent that the Investors do not timely exercise their exchange right, MT has the right to redeem their MT Preferred Stock for a price equal to $58,320 per share.  We also granted MT an exclusive license for certain therapeutic applications of the Manocept technology.