Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Fair Value of Warrant Liability (Details)

v3.8.0.1
Summary of Significant Accounting Policies - Fair Value of Warrant Liability (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair value of warrant liability $ 503
Quoted Prices in Active Markets for Identical Assets (Level 1)  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair value of warrant liability 0
Significant Other Observable Inputs (Level 2)  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair value of warrant liability 0
Significant Other Unobservable Inputs (Level 3)  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair value of warrant liability $ 503