Equity Transactions	12 Months Ended
Dec. 31, 2017
Equity Transactions [Abstract]
Equity Transactions	12. Equity Transactions As of December 31, 2017, the Company has reserved approximately 1.2 million of its authorized but unissued shares of common stock for future issuance pursuant to its employee stock option plans issued to employees and consultants. In December 2017, the Company issued an additional 12,268 fractional shares of its common stock as a result of is 1 to 6 reverse stock split and issued 387,597 shares in restricted common stock (see Note 13). In the second and third quarters of 2017, a total of 880,788 shares of the Company's common stock were issued from the exercise of warrants and options. On July 27, 2017, the Company issued 1,969,697 shares of its common stock and 500,000 warrants to purchase common stock as part of an exclusive licensing agreement granted to NantCell, Inc. On May 2, 2017, the Company issued 5 million of its common stock in a public offering. In the first quarter of 2017, the Company converted 518 shares of its Series B preferred stock in exchange for 1,233,334 shares of its common stock. In 2016, the Company issued 55,000 shares of its common stock resulting from the exercise of employee stock options and issued 387,597 shares in restricted common stock. On December 16, 2016, the Company issued 1,923,457 shares of its common stock and 550 convertible preferred shares at a stated value of $1,000, and repriced 3,232,981 warrants from the July 2016 financing, from $4.20 to $3.06 per common stock, along with extending their term through July 2018, all in respect of a public offering. As a result of the Series B conversion price of $2.52 being less than the common stock price at the closing date, a beneficial conversion feature was recognized in the amount of $0.3 million. Since the preferred stock was immediately convertible, the entire beneficial conversion feature was recognized as a deemed dividend on December 16, 2016. In December 2016, 32 preferred shares were converted at their conversion rate of $2.52 in exchange for 76,191 common shares. On July 20, 2016, the Company issued 4,761,905 shares of its common stock and one-year warrants to purchase an equal number of shares of its common stock in a public offering. On October 26, 2015, the Company retired 33,213 shares of its treasury stock at cost ($2.6 million). On July 24, 2015, the Company issued 1,744,167 shares of common stock in a public offering.

12. Equity Transactions

As of December 31, 2017, the Company has reserved approximately 1.2 million of its authorized but unissued shares of common stock for future issuance pursuant to its employee stock option plans issued to employees and consultants.

In December 2017, the Company issued an additional 12,268 fractional shares of its common stock as a result of is 1 to 6 reverse stock split and issued 387,597 shares in restricted common stock (see Note 13).

In the second and third quarters of 2017, a total of 880,788 shares of the Company's common stock were issued from the exercise of warrants and options.

On July 27, 2017, the Company issued 1,969,697 shares of its common stock and 500,000 warrants to purchase common stock as part of an exclusive licensing agreement granted to NantCell, Inc.

On May 2, 2017, the Company issued 5 million of its common stock in a public offering.

In the first quarter of 2017, the Company converted 518 shares of its Series B preferred stock in exchange for 1,233,334 shares of its common stock.

In 2016, the Company issued 55,000 shares of its common stock resulting from the exercise of employee stock options and issued 387,597 shares in restricted common stock.

On December 16, 2016, the Company issued 1,923,457 shares of its common stock and 550 convertible preferred shares at a stated value of $1,000, and repriced 3,232,981 warrants from the July 2016 financing, from $4.20 to $3.06 per common stock, along with extending their term through July 2018, all in respect of a public offering. As a result of the Series B conversion price of $2.52 being less than the common stock price at the closing date, a beneficial conversion feature was recognized in the amount of $0.3 million. Since the preferred stock was immediately convertible, the entire beneficial conversion feature was recognized as a deemed dividend on December 16, 2016. In December 2016, 32 preferred shares were converted at their conversion rate of $2.52 in exchange for 76,191 common shares.

On July 20, 2016, the Company issued 4,761,905 shares of its common stock and one-year warrants to purchase an equal number of shares of its common stock in a public offering.

On October 26, 2015, the Company retired 33,213 shares of its treasury stock at cost ($2.6 million).

On July 24, 2015, the Company issued 1,744,167 shares of common stock in a public offering.