Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2021

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 June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
General and administrative — employee		—		86,659		—		173,321
Total employee stock-based compensation	$	—	$	86,659	$	—	$	173,321

Schedule of Stock Options Activity

Presented below is our stock option activity:

	Six Months Ended June 30, 2021
	Number of Options (Employees)			Number of Options (Non-Employees)		Total Number of Options			Weighted-Average Exercise Price
Outstanding at January 1, 2021		2,801,270			365,000		3,166,270		$	7.43
Exercised		(300,000	)		—		(300,000	)	$	0.26
Forfeited or expired		(3,570	)		—		(3,570	)	$	30.24
Outstanding at June 30, 2021		2,497,700			365,000		2,862,700		$	8.15
Exercisable at June 30, 2021		2,497,700			365,000		2,862,700		$	8.15

Schedule of Ranges of Stock Options

The following table summarizes significant ranges of outstanding stock options under our plans at June 30, 2021:

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		550,000		8.46	$	0.26		550,000		8.46	$	0.26
$1.01 – $3.00		1,050,673		6.11	$	2.04		1,050,673		6.00	$	2.04
$3.01 – $15.00		852,360		3.47	$	12.56		852,360		3.47	$	12.56
$15.01 –$42.42		409,667		2.62	$	25.24		409,667		2.62	$	25.24
		2,862,700		5.28	$	3.32		2,862,700		5.28	$	3.32