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Significant Accounting Policies (Details)
1 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended
Apr. 24, 2017
$ / shares
shares
Nov. 22, 2016
USD ($)
May 31, 2017
USD ($)
Sep. 30, 2017
USD ($)
$ / shares
shares
Mar. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
$ / shares
shares
Jun. 30, 2017
USD ($)
Sep. 30, 2017
$ / shares
shares
Apr. 23, 2017
shares
Jan. 01, 2017
USD ($)
Reverse stock split, description               1-for-10 (1:10) reverse stock split of its common stock, par value $0.01 per share    
Conversion ratio of reverse stock split 10                  
Common stock, shares authorized | shares 67,000,000     67,000,000   67,000,000   67,000,000 670,000,000  
Common stock, par value (in dollars per share) | $ / shares $ 0.01     $ 0.01   $ 0.01   $ 0.01    
Total market capitalization             $ 6,700,000      
Increase in APIC and accumulated deficit resulting from newly adopted policy                   $ 8,000
Australian Taxation Office [Member]                    
Tax rebates received       $ 2,000,000   $ 900,000        
Public Offering of Warrants and Common Stock [Member]                    
Proceeds from equity offerings, gross   $ 4,000,000 $ 10,600,000              
Pseudomonas Program [Member]                    
Research and development in process         $ 5,300,000   1,900,000      
Staph Program [Member]                    
Research and development in process         $ 5,200,000   2,800,000      
In Process Research and Development [Member]                    
Impairment of in process research and development             5,800,000      
Income tax expense (benefit) related to IPR&D impairment             $ (1,300,000)