Net loss per common share (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net Loss Per Common Share Details
Stock options		$ 480,000
Warrants to purchase shares of common stock	154,455,397,549	111,197,591
Convertible notes	48,756,889,839	83,671,069
Total	$ 203,212,287,388	$ 195,348,660