Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

ACCOUNTS PAYABLE AND ACCRUED LIABILITIES - Additional Information (Detail)

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ACCOUNTS PAYABLE AND ACCRUED LIABILITIES - Additional Information (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Accrued Expenses And Other Liabilities [Line Items]    
Accounts payable and accrued liabilities $ 3,022 $ 4,528
Research And Development Suppliers [Member]    
Accrued Expenses And Other Liabilities [Line Items]    
Accounts payable and accrued liabilities 1,245 3,733
Legal And Insurance Service Provider [Member]    
Accrued Expenses And Other Liabilities [Line Items]    
Accounts payable and accrued liabilities $ 653 $ 446