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Notes Payable and Stock Warrants - Additional Information (Details) - USD ($)
Apr. 23, 2018
Feb. 23, 2018
Nov. 17, 2017
Jun. 30, 2018
Jun. 22, 2018
Mar. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]              
Class Of Warrant Or Right, Unassociated Warrant Grants, Cash Settlement Obligation           $ 368,533,620  
Common stock, shares authorized (in shares)       800,000,000 800,000,000   100,000,000
Commitment Loan [Member] | HCP-FVA, LLC              
Debt Instrument [Line Items]              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   30,000,000          
Line of Credit [Member] | Commitment Loan [Member] | HCP-FVA, LLC              
Debt Instrument [Line Items]              
Aggregate amount of debt   $ 3,000,000          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   40,000,000          
Proceeds from Issuance of Debt   $ 2,500,000          
Debt Instrument, Additional Amount Of Financing   $ 1,000,000          
Class Of Warrant Or Right, Additional Warrants   10,000,000          
Line of Credit [Member] | Amended And Restated Loan Agreement [Member] | HCP-FVA, LLC              
Debt Instrument [Line Items]              
Debt Instrument, Prepayment Premium Rate   5.00%          
Debt Instrument, Required Liquidity   $ 2,000,000          
Line Of Credit Facility, Cash Flow Variance Threshold   10.00%          
Line of Credit [Member] | Short Term Loan, Due May 2018 [Member] | Hale Capital Partners, LP [Member]              
Debt Instrument [Line Items]              
Aggregate amount of debt   $ 500,000          
Line of Credit [Member] | Short Term And Commitment Loans [Member]              
Debt Instrument [Line Items]              
Class Of Warrant Or Right, Subscription To Purchase, Percentage     50.00%        
Senior Notes [Member] | Commitment Loan [Member] | HCP-FVA, LLC              
Debt Instrument [Line Items]              
Aggregate amount of debt   $ 4,000,000          
Class Of Warrant Or Right, Senior Debt Component   $ 0.10          
Prime rate | Line of Credit [Member] | Short Term Loan, Due May 2018 [Member] | Hale Capital Partners, LP [Member]              
Debt Instrument [Line Items]              
Variable interest rate     0.75%        
Common Stock [Member] | Line of Credit [Member] | Commitment Loan [Member] | HCP-FVA, LLC              
Debt Instrument [Line Items]              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   489,320,000          
Class Of Warrant Or Right, Issued   12.233          
Class Of Warrant Or Right, Warrant Ownership, Percentage   25.00%          
Common Stock [Member] | Line of Credit [Member] | Short Term Loan, Due May 2018 [Member] | Hale Capital Partners, LP [Member]              
Debt Instrument [Line Items]              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights     61,165,134        
Common Stock [Member] | Line of Credit [Member] | Short Term And Commitment Loans [Member]              
Debt Instrument [Line Items]              
Class of Warrant or Right, Exercise Price of Warrants or Rights     $ 0.001        
Class Of Warrant Or Right, Subscription To Purchase, Percentage     66.66%        
Common Stock [Member] | Prime rate | Senior Notes [Member] | Commitment Loan [Member] | HCP-FVA, LLC              
Debt Instrument [Line Items]              
Variable interest rate   0.75%          
Additional Backstop Warrant [Member] | Line of Credit [Member] | Commitment Loan [Member] | HCP-FVA, LLC              
Debt Instrument [Line Items]              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights     3,000,000        
Financing Warrants [Member] | Line of Credit [Member] | Commitment Loan [Member] | HCP-FVA, LLC              
Debt Instrument [Line Items]              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights     366,990,000        
Common stock issued for warrants (in shares) 53,370,601            
Maximum | Hale Capital Partners, LP [Member] | Line of Credit [Member] | Short Term And Commitment Loans [Member]              
Debt Instrument [Line Items]              
Potential Ownership Percentage By Controlling Owners     73.00%        
Series A Preferred Stock | Line of Credit [Member] | Commitment Loan [Member] | HCP-FVA, LLC              
Debt Instrument [Line Items]              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   0.0225          
Class of Warrant or Right, Exercise Price of Warrants or Rights   $ 0.2643          
Series A Preferred Stock | Minimum [Member] | Line of Credit [Member] | Commitment Loan [Member] | HCP-FVA, LLC              
Debt Instrument [Line Items]              
Private Placement, Lender Purchase Commitment     25.00%        
Estimate of Fair Value Measurement [Member]              
Debt Instrument [Line Items]              
Warrant liability   $ 4,143,000