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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]  
Schedule of stock option activity
   Number of
Options		   Weighted
Average
Exercise
Price		   Weighted
Average
Remaining
Contractual
Life (Years)		   Aggregate
Intrinsic
Value		 
Outstanding as of December 31, 2021   
-
   $
-
                        
Granted   8,633,607   $3.04           
Exercised   
-
                
Cancelled/forfeited   (1,987,155)   3.96           
Outstanding as of December 31, 2022   6,646,452   $2.76    8.97   $
-
 
                     
Exercisable as of December 31, 2022   2,675,027    1.85    8.38    
-
 

  

   Number of
Options		   Weighted
Average
Exercise
Price		   Weighted
Average
Remaining
Contractual
Life (Years)		   Aggregate
Intrinsic
Value		 
Outstanding as of December 31, 2020   30,402,801   $2.45    8.75   $885 
Granted   5,287,031    4.74           
Exercised   (2,757,671)   2.30         7,740 
Expired/forfeited   (969,240)   3.65           
Outstanding as of December 31, 2021   31,962,921   $2.81    7.77   $86,075 
Granted   
-
    
-
           
Exercised   (1,606,795)   2.52         3,658 
Expired/forfeited   (6,933,850)   2.58         8,784 
Outstanding as of December 31, 2022   23,422,276   $2.83    6.92   $22 
                     
Exercisable as of December 31, 2022   16,013,998   $2.63    6.62   $21 

  

   Number of
Options		   Weighted
Average
Exercise
Price		   Weighted
Average
Remaining
Contractual
Life (Years)		   Aggregate
Intrinsic
Value		 
Outstanding as of December 31, 2020   6,490,208   $2.49    9.26   $1,174 
Granted   5,516,399    7.82           
Exercised   (1,630,925)   2.54         8,807 
Expired/forfeited   (848,955)   2.68           
Outstanding as of December 31, 2021   9,526,727   $5.55    8.01   $13,905 
Granted   
-
   $
-
           
Exercised   (2,181,335)   2.50         1,468 
Expired/forfeited   (1,726,880)   7.78           
Outstanding as of December 31, 2022   5,618,512   $6.34    6.94   $
-
 
                     
Exercisable as of December 31, 2022   1,181,230   $3.96    6.20   $
-
 

 
Schedule of weighted-average assumptions
   2022 
Risk-free interest rate:   2.73%
Expected term (in years):   6.99 
Expected volatility:   67.00%
Dividend yield:   0%
Grant date fair value per share  $3.19 

 

   2021 
Risk-free interest rate:   0.79%
Expected term (in years):   6.05 
Expected volatility:   42.10%
Dividend yield:   0.00%

 

   2021 
Risk-free interest rate:   1.39%
Expected term (in years):   9.06 
Expected volatility:   35.86%
Dividend yield:   0.00%

 
Schedule of RSU activity under the SI Plan
   Shares   Weighted
Average Fair Value		 
Outstanding as of December 31, 2021   
-
   $
             -
 
Granted   29,247,487   $0.87 
Released   (10,015,141)  $0.40 
Forfeited   (1,362,683)  $1.30 
Outstanding as of December 31, 2022 (1)   17,869,663   $1.09 

 

(1)The Company’s subsidiaries in China have employees who are citizens of People’s Republic of China (PRC). Pursuant to the regulation Circular 78 and Circular 7 issued by the Central State Administration of Foreign Exchange of PRC (“SAFE”), we cannot release vested RSUs to it’s PRC citizen employees before they have completed the required SAFE registration with a dedicated account set up for each of them to repatriate proceeds back to China under the SAFE. As a result, 1,448,697 RSUs of the Company’s PRC citizens employees vested in 2022 were included in the outstanding RSUs at December 31, 2022 as unreleased RSUs because those employees did not complete the SAFE registration process.

 
Schedule of stock-based compensation expense
   2022   2021 
Research and development  $13,118   $4,001 
Sales and marketing   1,744    1,185 
General and administrative   2,791    6,159 
   $17,653   $11,345 

Restricted stock awards for employee bonus, net

  2021 
Research and development  $7,613 
Sales and marketing   2,310 
General and administrative   8,694 
   $18,617