Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Schedule of Reconciliation of Derivative Liability Measured on Recurring Basis Using Unobservable Inputs (Level 3) (Details)

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Fair Value Measurements - Schedule of Reconciliation of Derivative Liability Measured on Recurring Basis Using Unobservable Inputs (Level 3) (Details) - Derivative Financial Instruments, Liabilities [Member] - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning balance $ (598) $ (13,970)
Issuances of derivatives (5,817) (14,556)
Modification of terms   (382)
Decrease in liability due to debt conversions   179
Decrease in liability due to warrants being exercised 273 10,326
Extinguishment of derivatives   3,468
Change in fair value (228) 652
Ending balance (6,370) (14,283)
Common Stock Warrants [Member]    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning balance (598) (11,358)
Issuances of derivatives (5,817) (14,556)
Modification of terms   (382)
Decrease in liability due to debt conversions  
Decrease in liability due to warrants being exercised 273 10,326
Extinguishment of derivatives  
Change in fair value (228) 1,687
Ending balance (6,370) (14,283)
Convertible Notes [Member]    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning balance (2,612)
Issuances of derivatives
Modification of terms  
Decrease in liability due to debt conversions   179
Decrease in liability due to warrants being exercised
Extinguishment of derivatives   3,468
Change in fair value (1,035)
Ending balance