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Equity Instruments (Details 2) - $ / shares
 6 Months Ended 12 Months Ended
Dec. 31, 2017
Jun. 30, 2017
Number of Warrants    
Number of Warrants Outstanding, Beginning Balance 286,049  
Number of Warrants, Warrants issued in connection with the August 2017 private offering 5,920,002  
Number of Warrants, Warrants issued to underwriters in connection with the August 2017 private offering 394,669  
Number of Warrants Outstanding, Ending Balance 6,600,720 286,049
Weighted Average Exercise Price    
Weighted Average Exercise Price, Outstanding Beginning Balance $ 50.29  
Weighted Average Exercise Price, Warrants issued in connection with the August 2017 private offering 3.60  
Weighted Average Exercise Price, Warrants issued to underwriters in connection with the August 2017 private offering 3.60  
Weighted Average Exercise Price, Outstanding Ending Balance $ 5.62 $ 50.29
Weighted Average Remaining Contractual Life in Years    
Weighted Average Remaining Contractual Life in Years, Outstanding 4 years 7 months 10 days 4 years 2 months 23 days