Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Inputs (Details)

v3.10.0.1
Fair Value Measurements - Inputs (Details)
 3 Months Ended
Jun. 30, 2018
$ / shares
Mar. 31, 2018
$ / shares
Jun. 30, 2017
$ / shares
Mar. 31, 2017
$ / shares
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]        
Stock price (in dollars per share) $ 1.51 $ 2.01 $ 1.03 $ 0.94
CCE interest rate 1.00%      
Convertible note embedded derivative liability        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]        
Probability of change in control 1.75%      
Stock price (in dollars per share) $ 1.51      
Expected term 2 years 3 months      
Assumed early conversion/exercise price (in dollars per share) $ 2.73      
Warrant liability        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]        
Probability of change in control 1.75%      
Stock price (in dollars per share) $ 1.51      
Expected term 2 years 3 months      
Assumed early conversion/exercise price (in dollars per share) $ 2.73      
Stock price volatility | Convertible note embedded derivative liability        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]        
Embedded derivative liability, measurement input 0.65      
Stock price volatility | Warrant liability        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]        
Embedded derivative liability, measurement input 0.65      
Risk-free interest rate | Convertible note embedded derivative liability        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]        
Embedded derivative liability, measurement input 0.0251      
Risk-free interest rate | Warrant liability        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]        
Embedded derivative liability, measurement input 0.0251