Stock Option Plans and Warrants to Purchase Common Stock (Details Textual) - USD ($)		1 Months Ended	12 Months Ended
	Jul. 02, 2018	Mar. 23, 2020	Dec. 31, 2019	Dec. 31, 2018	Jul. 09, 2018	Apr. 01, 2018
Weighted average exercise price			$ 3.77
Exercisable, weighted average remaining contractual term			8 years 2 months 1 day
Warrants to purchase			10,000		155,340	10,000
Common stock shares issued			21,753,124	17,682,839	1,165,048
Purchase price per share					$ 1.13	$ 1.95
Warrants to purchase, description	The Company closed an underwritten public offering of 7,766,990 shares of its common stock and exercisable warrants to purchase up to an aggregate of 3,106,796 shares of its common stock at a combined offering price of $1.03. In addition, at the closing the underwriters exercised the over-allotment option to purchase 1,165,048 additional shares of common stock and warrants to purchase up to 466,019 shares of common stock at a combined offering price of $1.03. The warrants have a per share exercise price of $2.25 and will expire 42 months from the date of issuance. On July 9, 2018, warrants to purchase 155,340 shares of the Company’s common stock were issued to representatives of the underwriters of the offering. The warrants are exercisable at a per share price of $1.13 and are exercisable twelve months from the effective date of the offering and will expire 42 months from the effective date of the offering.
Subsequent Event [Member]
Common stock exercise of warrants, Share		304,615
Public offering exercise price		$ 2.25
Stock Option Plans [Member]
Exercisable options			908,178
Weighted average exercise price			$ 5.49
Exercisable, weighted average remaining contractual term			7 years 4 months 2 days
Options outstanding			1,506,972
Shares available for grants			663,700
Stock options awarded			596,740	370,420
Fair value per share			$ 0.68	$ 0.77
Total compensation cost			$ 493,000