Quarterly report pursuant to Section 13 or 15(d)

Unaudited Interim Condensed Consolidated Statements of Cash Flows Supplemental Information - Summary of Significant Non-Cash Investing and Financing Activities (Detail)

v3.21.1
Unaudited Interim Condensed Consolidated Statements of Cash Flows Supplemental Information - Summary of Significant Non-Cash Investing and Financing Activities (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Cash Flow Non Cash Investing And Financing Activities Disclosure [Line Items]    
Share issuance – settlement of outstanding obligations $ 0 $ 193
MPX Warrants [Member]    
Cash Flow Non Cash Investing And Financing Activities Disclosure [Line Items]    
Cashless exercise of MPX warrants recorded as derivatives $ 0 $ 3,325