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SHORT-TERM INVESTMENTS (Tables)
9 Months Ended
Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]  
Components of Trading Securities
At September 30, 2023 and December 31, 2022, the components of short-term investments were as follows:
September 30,
2023
December 31,
2022
Short-term investments listed in Shanghai Stock Exchange
Cost$20,902 $14,779 
Market value21,844 20,209 
Unrealized Gain (Loss) on Trading Securities
Three Months Ended September 30,Nine Months Ended September 30,
2023202220232022
Unrealized loss on short-term investments
$(1,319)$(5,281)$(4,428)$(9,562)