Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments - Reconciliation of Level 3 Measurement of Company's April 2018 Warrant (Detail)

v3.19.1
Financial Instruments - Reconciliation of Level 3 Measurement of Company's April 2018 Warrant (Detail) - April 2018 Warrant [Member]
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Beginning, Balance $ 23
Change in fair value 13
Ending, Balance $ 36