Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Rollforward (Details)

v3.8.0.1
Fair Value Measurements - Rollforward (Details) - USD ($)
$ in Thousands
 6 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Derecognition on extinguishment or conversion $ 1,628 $ 140
Convertible note embedded derivative liability    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at March 31, 2017 3,218  
September 30, 2017 5,116  
Warrant liability    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at March 31, 2017 1,076  
September 30, 2017 2,704  
Level 3 | Convertible note embedded derivative liability    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at March 31, 2017 3,218  
Change in fair value of convertible note embedded derivative liability 4,652  
Derecognition on extinguishment or conversion (2,754)  
Level 3 | Warrant liability    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at March 31, 2017 1,076  
Change in fair value of convertible note embedded derivative liability 1,628  
Level 3 | Warrant liability | Warrant liability    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at March 31, 2017 1,076  
September 30, 2017 $ 2,704