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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Summary of Stock Option Awards

A summary of stock option awards as of December 31, 2019 and changes during the two-year period ended December 31, 2019 is presented below:

Stock Options		Number Outstanding				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (years)				Aggregate Intrinsic Value
Outstanding at January 1, 2018			703,442			$	10.34
Granted			2,629,004			$	2.26
Canceled or expired			(183,703	)		$	25.96
Outstanding at December 31, 2018			3,148,743			$	2.67
Granted			1,250,754			$	2.00
Canceled or expired			(67,355	)		$	2.50
Outstanding at December 31, 2019			4,332,142			$	2.63				8.5			$	5,882
Exercisable at December 31, 2019			2,469,033			$	2.98				8.0			$	-

Summary of Non-vested Restricted Stock Awards

A summary of the status of the Company’s non-vested restricted stock awards as of December 31, 2019 and changes during the two-year period ended December 31, 2019, is presented below:

Restricted Stock		Number Outstanding				Weighted Average Grant Date Fair Value
Non-vested stock awards outstanding at January 1, 2018			–			$	–
Granted			35,000			$	2.71
Vested and issued			(6,000	)		$	2.77
Forfeited			(6,500	)		$	2.64
Non-vested stock awards outstanding at December 31, 2018			22,500			$	2.72
Granted			29,250			$	1.99
Vested and issued			(5,000	)		$	2.14
Forfeited			(38,000	)		$	2.48
Non-vested stock awards outstanding at December 31, 2019			8,750			$	1.59

Summary of Stock Options Outstanding

A summary of stock options outstanding at December 31, 2019 by price range is as follows:

		Options Outstanding												Options Exercisable
Range of Exercise Prices		Number				Weighted Average Remaining Contractual Term (in years)				Weighted Average Exercise Price				Number				Weighted Average Remaining Contractual Term (in years)				Weighted Average Exercise Price
Up to $5.00			3,821,470				8.4			$	2.47				2,404,611				8.0			$	2.55
Above $5.00 to $81.90			64,422				6.0			$	19.00				64,422				6.0			$	19.00
			3,885,892												2,469,033

Schedule of Assumptions Used to Determine Fair Value of Options Granted

The Company used the following assumptions for determining the fair value of options granted under the Black-Scholes option pricing model:

		Year Ended December 31,
		2019				2018
Risk-free interest rate			2.82 to 3.02	%			2.82 to 3.02	%
Expected volatility			101.3 – 106.2	%			99.9 - 102.1	%
Expected life (in years)			7.5 to 9.3				8.5 to 10
Expected dividend yield			0.0	%			0.0	%

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Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

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-Name Accounting Standards Codification
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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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