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
 9 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Derecognition on extinguishment or conversion $ 2,526 $ (797)
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  
December 31, 2017 5,896  
Warrant liability    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at March 31, 2017 1,076  
December 31, 2017 3,602  
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 6,310  
Derecognition on extinguishment or conversion (3,632)  
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 2,526  
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  
December 31, 2017 $ 3,602