Net Income (Loss) Per Share (Details Textual) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Non-employees [Member]
Net Income (Loss) Per Share (Textual)
Warrants to purchase shares of common stock	1,080,059
Non-Director [Member]
Net Income (Loss) Per Share (Textual)
Warrants to purchase shares of common stock	346,936
Restricted stock units [Member]
Net Income (Loss) Per Share (Textual)
Warrants to purchase shares of common stock	86,250
Stock options [Member]
Net Income (Loss) Per Share (Textual)
Warrants to purchase shares of common stock		1,188,392
Warrants [Member]
Net Income (Loss) Per Share (Textual)
Warrants to purchase shares of common stock		86,250