Common Stock: (Details Textual) - $ / shares
 6 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Dec. 31, 2014
Apr. 12, 2016
Class of Stock [Line Items]        
Common Stock, Shares Authorized 400,000,000 400,000,000 300,000,000 400,000,000
Convertible Preferred Stock, Shares Issued upon Conversion   24,571,077    
Class of Warrant or Right, Exercise Price of Warrants or Rights   $ 1.06 $ 0.82  
Series A Convertible Redeemable Preferred Stock [Member]        
Class of Stock [Line Items]        
Conversion of Stock, Shares Converted   21,363,000 1,637,000  
Convertible Preferred Stock, Shares Issued upon Conversion   21,363,000 1,637,000  
Weighted Average Anti-dilution Stock [Member]        
Class of Stock [Line Items]        
Convertible Preferred Stock, Shares Issued upon Conversion   3,208,077    
Series B Convertible Preferred Stock [Member]        
Class of Stock [Line Items]        
Conversion of Stock, Shares Converted 4,300      
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 0.0001      
Neurotrope Inc. [Member] | Common Stock [Member]        
Class of Stock [Line Items]        
Convertible Preferred Stock, Shares Issued upon Conversion 430,000      
Warrants Exercisable 27,364 565,061 613,228  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 27,364 565,061 613,228  
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 0.01 $ 0.01 $ 0.01