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Subsequent Events (Details)
$ / shares in Units, $ in Millions
Feb. 05, 2019
USD ($)
$ / shares
Jan. 03, 2019
USD ($)
$ / shares
Apr. 24, 2017
Subsequent Event [Line Items]      
Reverse stock split ratio     10
Scenario, Plan [Member]      
Subsequent Event [Line Items]      
Expected price per share of combined entity | $ / shares $ 0.36    
Subsequent Event [Member]      
Subsequent Event [Line Items]      
Common stock purchased upon closing of merger, value $10.0    
Numerator for determination of per share price of Share Purchase Agreement | $ $ 40.0    
Subsequent Event [Member] | C3J [Member]      
Subsequent Event [Line Items]      
Commitment to invest in the combined company | $   $ 10.0  
Subsequent Event [Member] | C3J [Member] | Agreement and Plan of Merger and Reorganization [Member]      
Subsequent Event [Line Items]      
Number of shares issued per common stock outstanding | $ / shares   $ 0.6892  
Percentage of ownership   30.00%  
Subsequent Event [Member] | C3J [Member] | Agreement and Plan of Merger and Reorganization [Member] | C3J [Member]      
Subsequent Event [Line Items]      
Percentage of ownership   70.00%  
Subsequent Event [Member] | C3J [Member] | Agreement and Plan of Merger and Reorganization [Member] | Minimum [Member]      
Subsequent Event [Line Items]      
Reverse stock split ratio   0.33  
Subsequent Event [Member] | C3J [Member] | Agreement and Plan of Merger and Reorganization [Member] | Maximum [Member]      
Subsequent Event [Line Items]      
Reverse stock split ratio   0.05