Consolidated Statements of Stockholders' Equity (Parentheticals)	Dec. 31, 2018 $ / shares
Consulting Agreement One [Member]
Price of shares issued (in dollars per share)	$ 11.80
Contract with TumorGenesis [Member]
Price of shares issued (in dollars per share)	11.70
Over-Allotment Option [Member]
Price of shares issued (in dollars per share)	9.497
Series E Warrants [Member]
Warrant exercises, exercise price per share (in dollars per share)	$ 10