Summary of Significant Accounting Policies (Details 2) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Total common stock equivalents excluded from diluted net loss per share	16,331,908	19,553,947
Convertible Debt [Member]
Total common stock equivalents excluded from diluted net loss per share	3,700,000	3,100,000
Stock Options [Member]
Total common stock equivalents excluded from diluted net loss per share	8,526,510	9,216,184
Warrants [Member]
Total common stock equivalents excluded from diluted net loss per share	4,105,398	7,237,763