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Related Party Transactions (Details)
$ / shares in Units, shares in Thousands
3 Months Ended 7 Months Ended 12 Months Ended 13 Months Ended
Dec. 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Sep. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
employee
Dec. 31, 2015
USD ($)
Nov. 06, 2014
USD ($)
$ / shares
Related Party Transaction [Line Items]                          
Exercisable period of warrants or rights                 7 years        
Exercise price of warrants | $ / shares                         $ 2.67
Research and development $ 1,806,000 $ 1,739,000 $ 1,453,000 $ 990,000 $ 951,000 $ 659,000 $ 547,000 $ 421,000 $ 26,000 $ 5,988,000 $ 2,578,000    
Value of warrants                         $ 600,000
Patent related expenses                 26,000 500,000 400,000    
Private Placement [Member]                          
Related Party Transaction [Line Items]                          
Offering consideration                 7,147,000        
MDB Capital Group, LLC [Member]                          
Related Party Transaction [Line Items]                          
Placement agent fees                 800,000        
Offering consideration                 $ 1,000        
Exercise price of warrants | $ / shares                 $ 2.67        
Executive search expenses                     $ 49,000    
Number of directors appointed | employee                     1    
Offering related expenses                     $ 42,000    
Patent related expenses                     26,000    
Accounts payable and accrued expenses         $ 58,000           58,000 $ 58,000  
MDB Capital Group, LLC [Member] | Initial Public Offering [Member]                          
Related Party Transaction [Line Items]                          
Underwriting discounts                   1,800,000      
Unaccountable expense reimbursement                   200,000      
Value of warrants $ 1,400,000                 $ 1,400,000      
MDB Capital Group, LLC [Member] | Chief Financial Officer [Member]                          
Related Party Transaction [Line Items]                          
Officers compensation, monthly                       $ 4,000  
Officer compensation                 $ 8,000   $ 48,000    
Common Stock [Member] | Private Placement [Member]                          
Related Party Transaction [Line Items]                          
Shares sold | shares                 2,996        
Offering consideration                 $ 3,000