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Related Party Transactions (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 14 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Related Party Transaction [Line Items]          
Research and development $ 1,453 $ 547 $ 2,443 $ 968  
ODURF [Member] | Minimum [Member]          
Related Party Transaction [Line Items]          
Ownership percentage 10.00%   10.00%    
MDB Capital Group, LLC [Member] | Initial Public Offering [Member]          
Related Party Transaction [Line Items]          
Underwriting discounts     $ 1,800    
Unaccountable expense reimbursement     160    
Value of warrants $ 1,443   1,443    
Accounts payable for expenses related to IPO 15   15   $ 58
MDB Capital Group, LLC [Member] | Chief Financial Officer [Member]          
Related Party Transaction [Line Items]          
Officers compensation, monthly         $ 4
Officer compensation   $ 12   $ 24  
Intellectual Property Related Services [Member] | MDB Capital Group, LLC [Member]          
Related Party Transaction [Line Items]          
Research and development $ 45   $ 100