Net Loss per Share (Details 1) - shares	Jun. 30, 2019	Jun. 30, 2018
Outstanding stock options and common stock warrants	110,897,261	121,673,573
Outstanding stock options and common stock warrants exercisable	112,402,564	118,945,543
Common Stock Issuable
Outstanding stock options and common stock warrants	494,697	2,728,030
Stock Option [Member]
Outstanding stock options and common stock warrants	4,000,000	4,000,000
Common stock warrants [Member]
Outstanding stock options and common stock warrants	72,239,539	67,287,631
Convertible notes [Member]
Outstanding stock options and common stock warrants	31,285,755	43,280,642
Convertible preferred stock [Member]
Outstanding stock options and common stock warrants	2,877,270	4,377,270
Convertible preferred stock issuable [Member]
Outstanding stock options and common stock warrants