Stockholders' Deficit (Details) - USD ($)							3 Months Ended
	Jul. 31, 2017	Jun. 30, 2017	May 10, 2017	Feb. 10, 2017	Feb. 07, 2017	Oct. 11, 2016	Sep. 30, 2017	Sep. 01, 2017	Jul. 18, 2017	Jun. 29, 2017
Total shares authorized										260,000,000
Common stock, shares authorized		250,000,000					250,000,000			250,000,000
Preferred stock, shares authorized										10,000,000
Common stock, par value		$ 0.01				$ 3.00	$ 0.01
Gross proceeds from sale of common stock						$ 30,000,000
Net proceeds from sale of common stock						$ 28,600,000	$ 5,906,251
Number of months warrants exercisable						6 months
Exercise price of warrant						$ 3.75
Shares that warrants can purchase						10,000,000
Warrants exercised								675,000	900,000
Changes in fair value of warrant liabilities		$ 2,600,000					86,378,330
Reclass of Warrant Liability to Capital Contributed in Excess of Par							11,241,662
Warrant Liability.
Reclass of Warrant Liability to Capital Contributed in Excess of Par							1,575,000
Warrant Liability. | Level 2
Changes in fair value of warrant liabilities							86,378,000
Reclass of Warrant Liability to Capital Contributed in Excess of Par							$ 11,241,000
Convertible preferred stock
Preferred stock, shares authorized		10,000,000					10,000,000
Preferred stock, par value		$ 0.01					$ 0.01
Preferred stock, shares issued		1,000,000					0
Preferred stock, shares outstanding		1,000,000					0
Securities Purchase Agreement | Seattle Genetics, Inc., (“SGEN”)
Agreement purchase shares of common stock	3,000,000			3,000,000
Common stock, par value				$ 4.90
Gross proceeds from sale of common stock				$ 14,700,000
Warrants term					3 years
Shares that warrants can purchase	8,655,804			8,655,804
Fair value of warrants						$ 7,300,000
Private placement | Convertible preferred stock
Preferred stock, shares issued			1,000,000
Share price (in dollars per share)			$ 125
Gross proceeds			$ 125,000,000
Conversion ratio			23.10536
Conversion of shares	23,105,360		23,105,348
Average stock price			$ 5.41
Over-Allotment Option
Agreement purchase shares of common stock						10,000,000
Previously Reported [Member]
Total shares authorized										165,000,000
Common stock, shares authorized										155,000,000
Preferred stock, shares authorized										10,000,000