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Reverse Stock Split (Details)
May 12, 2017
$ / shares
shares
Jun. 30, 2017
shares
May 11, 2017
shares
Dec. 31, 2016
shares
Class of Stock [Line Items]        
Shares outstanding (in shares) | shares 1,268,440 1,650,519 10,147,721 836,862
Reverse stock split conversion ratio 0.125      
Minimum        
Class of Stock [Line Items]        
Closing bid price (in dollars per share) | $ / shares $ 1.00