Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Schedule of Market-based Assumptions (Details)

v3.10.0.1
Fair Value Measurements - Schedule of Market-based Assumptions (Details)
9 Months Ended
Dec. 31, 2018
$ / shares
Sep. 30, 2018
$ / shares
Mar. 31, 2018
$ / shares
Dec. 31, 2017
$ / shares
Sep. 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) $ 1.83 $ 1.24 $ 2.01 $ 1.79 $ 1.51 $ 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 (as a percent) 1.75%          
Stock price (in dollars per share) $ 1.83          
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 (as a percent) 1.75%          
Stock price (in dollars per share) $ 1.83          
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 (as a percent) 0.60          
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 (as a percent) 0.60          
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 (as a percent) 0.0249          
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 (as a percent) 0.0249          
Expected term | Convertible note embedded derivative liability            
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]            
Expected term 1 year 9 months          
Expected term | Warrant liability            
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]            
Expected term 1 year 9 months