Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Share-based Payment Arrangement [Abstract]

Schedule of Stock-based Compensation Expense

The following table sets forth the total stock-based compensation expense resulting from stock options, restricted stock and warrants included in our Condensed Consolidated Statements of Operations:

	Three Months Ended September 30,				Nine Months Ended September, 30,
	2020		2019		2020		2019
Research and development	$	—	$	—	$		$	(2,672	)
General and administrative — employee		87,277		216,234		260,598		644,113
Total employee stock-based compensation	$	87,277	$	216,234	$	260,598	$	641,441

Schedule of Share-based Compensation, Stock Options, Activity

Presented below is our stock option activity:

	Nine Months Ended September 30, 2020
	Number of Options (Employees)			Number of Options (Non-Employees)			Total Number of Options			Weighted-Average Exercise Price
Outstanding at January 1, 2020		7,126,340			615,000			7,741,340		$	3.32
Granted		—			—			—			—
Exercised		(4,300,000	)		(250,000	)		(4,550,000	)	$	0.26
Forfeited or expired		(3,570	)		—			(3,570	)	$	32.76
Outstanding at September 30, 2020		2,822,770			365,000			3,187,770		$	7.67
Exercisable at September 30, 2020		2,432,320			365,000			3,162,320		$	7.71

Schedule of Ranges of Stock Options

The following table summarizes significant ranges of outstanding stock options under our plans at September 30, 2020:

Range of Exercise Prices		Number of Options		Weighted-Average Remaining Contractual Life (years)		Weighted-Average Exercise Price		Number of Options Exercisable		Weighted-Average Remaining Contractual Life (years)		Weighted-Average Exercise Price
$	0.26 - $1.00		850,000		9.21	$	0.26		850,000		9.21	$	0.26
$	1.01 – $3.00		1,050,673		6.86	$	2.04		1,025,223		6.75	$	2.05
$	3.01 – $15.00		852,360		4.22	$	12.56		852,360		4.22	$	12.56
$	15.01 –$42.42		434,737		3.19	$	26.13		434,737		3.19	$	26.13
			3,187,770		6.28	$	7.67		3,162,320		8.24	$	7.71