Net loss per common share (Details) - USD ($)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Net Loss Per Common Share Details
Stock options		$ 480,000
Warrants to purchase shares of common stock	382,228,047	116,735,061
Convertible notes	4,812,962,963	78,944,078
Total	$ 5,195,191,010	$ 196,159,169