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Related party balances and transactions (Tables)
 6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Related Party Transactions [Abstract]    
Schedule of amount due from related party  
 

December 31,
2019

  

December 31,
2020

Amount due from related party:

  

 

    

 

  

Ochem(i)

  

$

1,856

  

$

—

Total

  

$

1,856

  

$

—

(i)      The balance represents advance payment for materials purchased from Ochem.
Schedule of related parties transactions
 

Three months ended
June 30,

  

Six months ended
June 30,
   

2020

  

2021

  

2020

  

2021

Raw material sold to Ochem

  

$

—

  

$

138

  

$

—

  

$

293
 

Year Ended December 31,
   

2018

  

2019

  

2020

Raw material purchased from Ochem

  

$

30

  

$

—

  

$

—

Raw material purchased from Ochemate

  

 

2

  

 

—

  

 

—

Raw material sold to Ochem

  

 

—

  

 

—

  

 

167
Schedule of relationship with the group

Name

  

Relationship with the Group

Ochem

  

Controlled by CEO

Ochemate

  

Controlled by CEO