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Equity Awards (Tables)

12 Months Ended

Dec. 31, 2018

Schedule of Changes in Warrants Outstanding

he following table sets forth the changes in the number of warrants outstanding for the periods presented:



	Number of Warrants		Weighted Average Exercise Price
Outstanding at December 31, 2016	2,148,741		$	11.04
Exercised	(1,181,235	)	3.64
Forfeited, Canceled	(257,332	)	50.76
Outstanding at December 31, 2017	710,174		8.95
Exercised	(18,405	)	3.00
Forfeited, Canceled	(163,715	)	3.34
Outstanding at December 31, 2018	528,054		$	10.90

Assumptions Used to Measure the Fair Value of Warrants Exercised

The fair value of the warrants exercised was valued using the Black Scholes option pricing model based on the following assumptions:



Stock Price	$	4.84
Exercise Price	$	3.64
Term in years	4.29
Volatility	101.93		%
Annual rate of quarterly dividends	0		%
Discount rate- bond equivalent yield	1.65		%

Summary of Option Award Activity

The following is a summary of option award activity under the Plan for the year ended December 31, 2018:



	Year Ended December 31, 2018
	Total Stock Options Outstanding		Weighted Average Exercise Price per Share		Nonvested Stock Options	Weighted Average Grant Date Fair Value per Share
December 31, 2017	211,487		$	36.94	—	$	—
Forfeited, Canceled	(51,411	)	40.12		—	—
December 31, 2018	160,076		$	35.92	—	$	—

Summary of Outstanding Stock Options

The following is a summary of outstanding stock options under the Plan as of December 31, 2018:



	Stock Options Outstanding		Vested Stock Options
Quantity	160,076		160,076
Weighted-average exercise price	$	35.92	$	35.92
Weighted Average Remaining Contractual Term (in Years)	4.26		4.26
Intrinsic value	$	—	$	—

- Definition

Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

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