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CONVERTIBLE NOTES (Tables)
 12 Months Ended
Dec. 31, 2021
CONVERTIBLE NOTES [Abstract]  
Convertible Debts

    As of December 31,   
 

 
2020
$
    
2021
$
  
             
2023 Convertible Notes
    
41,263
      
28,207
  
2024 Convertible Notes
    
916,560
      
131,528
  
2025 Convertible Notes
    
882,583
      
928,683
  
2026 Convertible Notes
     –      
2,387,290
  
      1,840,406       3,475,708  
Issuance of Convertible Notes and Terms
The Company issued the following convertible notes and the terms are as follow:

2023 Convertible Notes
2024 Convertible Notes
2025 Convertible Notes
2026 Convertible Notes
Issuance date
June 18, 2018
November 18, 2019
May 22, 2020
 September 14, 2021
Maturity date
July 1, 2023
December 1, 2024
December 1, 2025
 September 15, 2026
Principal amount
$575,000
$1,150,000
$1,150,000
 $2,875,000
Interest rate
2.25%
1.00%
2.375%
 0.25%
Initial conversion rate
50.5165 American Depositary Shares (“ADSs”)
per $1 principal amount, equivalent
to $19.80 per ADS
19.9475 ADSs per $1 principal amount, equivalent
to $50.13 per ADS
11.0549 ADSs per $1 principal amount, equivalent
to $90.46 per ADS
2.0964 ADSs per $1 principal amount, equivalent
to $477.01 per ADS
Agreed conversion date
January 1, 2023
June 1, 2024
September 1, 2025
 June 15, 2026
Convertible Notes With Cash Conversion Option
The Convertible Notes were accounted for under ASC 470-20 Cash Conversion Subsections as follow:

 
2023 Convertible
Notes
    
2024 Convertible
Notes
    
2025 Convertible
Notes
     2026 Convertible
Notes
  
                                 
Liability component
  
$
410,926
    
$
897,918
    
$
856,635
     $
2,359,492  
Effective interest rate
    
9.38
%
    
6.03
%
    
8.21
%
     4.27 %
Equity component
  
$
152,714
    
$
240,582
    
$
284,727
     $
 486,758  
Debt issuance cost, allocated in proportion to the allocation of proceeds
  
$
11,360
    
$
11,500
    
$
8,638
     $
28,750  

Carrying Amount of the Liability Components

The liability component was initially measured at fair value and subsequently amortized to its redemption amount using the effective interest method. The residual value was allocated to the equity component, classified within “Additional Paid-in Capital” and not subsequently remeasured. The following table presents the carrying amount of the liability components of the Convertible Notes:

 
As of December 31, 2020
    
As of December 31, 2021
  
   
2023
Convertible
Notes
$
    
2024
Convertible
Notes
$
    
2025
Convertible
Notes
$
    
Total
$
    
2023
Convertible
Notes
$
    
2024
Convertible
Notes
$
    
2025
Convertible
Notes
$
    
2026
Convertible
Notes
$
    
Total
$
  
Principal
    
49,000
      
1,112,320
      
1,149,500
      
2,310,820
      
31,305
      
152,048
      
1,149,500
       2,875,000
      
4,207,853
  
Less: unamortized issuance cost and debt discount
    
(7,737
)
    
(195,760
)
    
(266,917
)
    
(470,414
)
    
(3,098
)
    
(20,520
)
    
(220,817
)
     (487,710 )    
(732,145
)
Net carrying amount
    
41,263
      
916,560
      
882,583
      
1,840,406
      
28,207
      
131,528
      
928,683
       2,387,290
      
3,475,708
  
Capped Calls
In connection with the offering of 2024 Convertible Notes and 2025 Convertible Notes, the Company entered into separately negotiated capped call transactions with certain counterparties (collectively, the “Capped Calls”). The details of the Capped Calls are as follows:

 
2024 Convertible
Notes
    
2025 Convertible
Notes
  
Initial strike price per share
  
$
50.13
    
$
90.46
  
Initial cap price per share
  
$
70.36
    
$
136.54