13. EQUITY INCENTIVE PLAN

The Company's 2006 Equity Incentive Plan (the "2006 Plan") was terminated as to future awards on July 12, 2016. The Company's 2017 Stock Option and Incentive Plan (the "2017 Plan") was adopted by the Company's stockholders on June 5, 2017 and will expire on June 5, 2027. There are 666,666 shares of common stock reserved for issuance under the 2017 Plan.

The Plan is administered by the Compensation Committee of the Board of Directors (the “Committee”), which has the authority to set the number, exercise price, term and vesting provisions of the awards granted under the Plan, subject to the terms thereof. Either incentive or non-qualified stock options may be granted to employees of the Company, but only non-qualified stock options may be granted to non-employee directors and advisors. However, in either case, the Plan requires that stock options must be granted at exercise prices not less than the fair market value of the common stock on the date of the grant. Options issued under the plan vest over periods as determined by the Committee and expire 10 years after the date the option was granted.

The company accounts for all stock-based compensation payments to employees and directors, including grants of employee stock options, at fair value and expenses the benefit in operating expense in the consolidated statements of operations over the service period of the awards. The fair value of each stock option granted is estimated on the date of grant using the Black-Scholes option pricing model, which requires various assumptions including estimating stock price volatility, expected life of the stock option, risk free interest rate and estimated forfeiture rate.

Stock Options.

During the year ended December 31, 2017, The Company granted stock options to employees and directors to purchase up to 232,332 shares of common stock at a weighted average exercise price of $1.85. These awards have vesting periods of three to four years and had a weighted average grant date fair value of $1.59. The fair value calculation of options granted during 2017 used the follow assumptions: risk free interest rates of 1.87% to 2.01%, based on the U.S. Treasury yield in effect at the time of grant; expected life of six years; and volatility of 118% based on historical volatility of the Company’s common stock over a time that is consistent with the expected life of the option.

The following table summarizes stock option activity under our plans during the year ended December 31, 2017:


	Number of Options		Weighted-Average Exercise Price
Outstanding at January 1, 2017	24,600		$	107.83
Granted	232,332		1.85
Forfeited	(20,448	)	68.39
Outstanding at December 31, 2017	236,484		$	7.12
Exercisable at December 31, 2017	13,161		$	93.27

As of December 31, 2017, there were 180,645 options that were vested or expected to vest with an aggregate intrinsic value of zero and a remaining weighted average contractual life of 9.6 years.

During both of the years ended December 31, 2017 and 2016, we recorded compensation expense for all stock awards of less than $0.1 million within operating expense in the accompanying statements of operations. As of December 31, 2017, the unrecognized compensation expense related to unvested stock awards was $0.3 million, which is expected to be recognized over a weighted-average period of 3.6 years.

Stock Appreciation Rights (“SARs”)

As of December 31, 2017, zero SARs shares were outstanding. During year ended December 31, 2017, the SARs liability decreased approximately $8,000 and at December 31, 2017, no liability was recorded in accrued expenses since there were no shares outstanding.