AVAILABLE-FOR-SALE AND EQUITY SECURITIES

12 Months Ended

Dec. 31, 2015

Investments, Debt and Equity Securities [Abstract]

AVAILABLE-FOR-SALE AND EQUITY SECURITIES

8. AVAILABLE-FOR-SALE AND EQUITY SECURITIES

	December 31,  2015		December 31,  2014		Number of  shares		Type
Security Innovation, Inc.		—		—		223,317	Common stock
Xion Pharmaceutical Corporation		—		—		60	Common stock

In prior years, we acquired 3,129,509 shares of NTRU Cryptosystems, Inc. ("NTRU") common stock, and certain preferred stock that later was redeemed, in exchange for cash and a reduction in our future royalty rate on sales of NTRU's products. NTRU was a privately held company that sold encryption software for security purposes, principally in wireless markets. There was no public market for NTRU shares. In 2003, we wrote down the value of NTRU to $0, but we continued to own the shares. On July 22, 2009, all NTRU assets were acquired by Security Innovation, an independent provider of secure software located in Wilmington, MA. We received 223,317 shares of stock in the privately held Security Innovation for our shares of NTRU.

In September 2009 we announced the formation of a joint venture with Xion Corporation for the commercialization of our patented melanocortin analogues for treating sexual dysfunction and obesity. We received 60 shares of privately held Xion Pharmaceutical Corporation common stock in June 2010. CTI currently owns 30% of the outstanding stock of Xion Pharmaceutical Corporation.