Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments - Summary of Fair Value Hierarchy of Company's Financial Assets and Financial Liabilities (Detail)

v3.21.2
Financial Instruments - Summary of Fair Value Hierarchy of Company's Financial Assets and Financial Liabilities (Detail) - USD ($)
Jun. 30, 2021
Dec. 31, 2020
Financial Assets    
Long term investments - other [1] $ 713 $ 512
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Recurring    
Financial Liabilities    
Derivative liabilities 136 245
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Recurring | Level 3 [Member]    
Financial Liabilities    
Derivative liabilities $ 136 $ 245
[1] Long-term investments – other are included in the investments balance on the unaudited interim condensed consolidated balance sheets.