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LONG-TERM INVESTMENT (Tables)
 12 Months Ended
Dec. 31, 2021
LONG-TERM INVESTMENT [Abstract]  
Long-Term Investment
The Company treats the equity investment in the consolidated financial statements under the equity method. Under the equity method, the investment is initially recorded at cost, adjusted for any excess of the Company’s share of the incorporated-date fair values of the investee’s identifiable net assets over the cost of the investment (if any). Thereafter, the investment is adjusted for the post incorporation change in the Company’s share of the investee’s net assets and any impairment loss relating to the investment. 

 
December 31,
  
   
2021
    
2020
  
Ninebell
  
$
3,051
    
$
1,666
  
Shengyi
    
211
      
134
  
Hefei Shixi
    
7,864
      
4,540
  
Subtotal
     11,126       6,340  
Other investee:
                
Waferworks
     1,568       -  
Total
  
$
12,694
    
$
6,340