Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Details Textual)

v3.8.0.1
Subsequent Events (Details Textual) - USD ($)
Mar. 17, 2018
Jan. 03, 2018
Nov. 28, 2017
Subsequent Event [Line Items]      
Research And Development Expense, Sponsored Research Payment     $ 800,000
Subsequent Event [Member] | City Of Hope [Member]      
Subsequent Event [Line Items]      
Research And Development Expense, Sponsored Research Payment   $ 900,000  
Subsequent Event [Member] | City Of Hope [Member] | Patent and Know-how Rights [Member]      
Subsequent Event [Line Items]      
Research And Development Expense, Sponsored Research Payment   $ 75,000  
Subsequent Event [Member] | Fred Hutchinson Cancer Research Center [Member]      
Subsequent Event [Line Items]      
Research And Development Expense, Sponsored Research Payment $ 600,000