Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Financial liabilities (Detail)

v3.19.1
Fair Value Measurements - Financial liabilities (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Mar. 31, 2018
Sep. 28, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Financial liabilities $ 8,013 $ 8,656 $ 4,916
Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Financial liabilities 0 0 0
Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Financial liabilities 0 0 0
Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Financial liabilities 8,013 8,656 4,916
Convertible note embedded derivative liability      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative liability 0 4,676 3,693
Convertible note embedded derivative liability | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative liability 0 0 0
Convertible note embedded derivative liability | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative liability 0 0 0
Convertible note embedded derivative liability | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative liability 0 4,676 3,693
Warrant liability      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative liability 8,013 3,980 1,223
Warrant liability | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative liability 0 0 0
Warrant liability | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative liability 0 0 0
Warrant liability | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative liability $ 8,013 $ 3,980 $ 1,223