Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Derivative Contingently Issuable Warrant liabilities (Detail)

v3.19.1
Fair Value Measurements - Derivative Contingently Issuable Warrant liabilities (Detail) - Caelum Warrant Liabilities [Member]
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Beginning balance $ 991
Issuance of warrant due to conversion of note (991)
Ending balance $ 0