Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of preferred stock

	As of December 31, 2019						As of December 31, 2018
	Preferred Shares Outstanding		Liquidation Preference (Per Share)		Total Liquidation Preference		Preferred Shares Outstanding		Liquidation Preference (Per Share)		Total Liquidation Preference
Series C-2		-		-		-		150,000	$	10.00	$	1,500,000
Series C-3		52,000	$	10.00	$	520,000		104,000	$	10.00	$	1,040,000
Series D		-		-		-		73,962	$	21.00	$	1,553,202
Series E		89,623	$	49.20	$	4,409,452		89,623	$	49.20	$	4,409,452
Series F		-		-		-		2,000	$	1,000.00	$	2,000,000
Series G		100,000	$	187.36	$	18,736,452		-		-		-
Total		241,623			$	23,665,904		419,585			$	10,502,654

Schedule of fair value assumptions for black sholes

Expected term, years	3.0
Volatility	93.3	%
Dividend yield	0.0	%
Risk-free interest rate	1.53	%

Warrants [Member]

Schedule of fair value assumptions for black sholes

Expected Term		5.0 years
Volatility		102.85	%
Dividend yield		0.0	%
Exercise Price	$	1.50
Risk-free interest rate		2.51	%

Expected term	2.88 years
Volatility	111.5	%
Dividend yield	0.0	%
Risk-free interest rate	1.62	%

Schedule of option activity under plan and related information

	Shares Underlying Warrants			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life
Outstanding at December 31, 2018		3,319,008		$	5.50		3.1
Issued		-			-		-
Exercised		(1,948,207	)	$	4.45		-
Canceled in connection with the Exchange Agreement		(892,973	)	$	4.68		-
Expired		(136,500	)	$	12.50		-
Outstanding at December 31, 2019		341,328		$	6.24		1.42

Stock Options [Member]

Schedule of fair value assumptions for black sholes

	Year Ended December 31,
	2019	2018
Risk-free interest rate	1.51% - 2.74%	2.63% - 2.96%
Expected volatility	103% - 110%	93% - 103%
Expected term (years)	5 – 10 years	5 years
Expected dividend yield	0.0%	0.0%
Weighted-average grant date fair value of options granted during the period	$6.11	$8.00

Schedule of option activity under plan and related information

	Shares Underlying Stock Options			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value
Outstanding at beginning of year		1,011,266		$	9.32		6.7	$	1,006,743
Granted		496,300		$	7.64				156,744
Exercised		(38,090	)	$	3.22				154,589
Expired/Canceled		(7,093	)	$	10.29				664
Forfeited		(85,989	)	$	7.73				53,047
Outstanding at end of year		1,376,394		$	8.98		6.8	$	1,232,545
Vested at end of year		932,959		$	9.31		6.0	$	950,659
Expected to vest in the future		443,435		$	8.28		8.6	$	281,887