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STOCK-BASED COMPENSATION - Black-Scholes Option Pricing (Details) - $ / shares
12 Months Ended
Jan. 03, 2022
Apr. 14, 2021
Jan. 02, 2020
Sep. 30, 2022
Exercise price (US$) $ 7.23      
Tranche 11        
Exercise price (US$)       $ 13.8
Average risk-free interest rate       1.73%
Expected option life (year)       5 years
Volatility rate       80.72%
Dividend yield       0.00%
Tranche 12        
Exercise price (US$)       $ 20.5
Average risk-free interest rate       1.79%
Expected option life (year)       10 years
Volatility rate       69.27%
Dividend yield       0.00%
Tranche 13        
Exercise price (US$)       $ 16.5
Average risk-free interest rate       1.75%
Expected option life (year)       10 years
Volatility rate       69.92%
Dividend yield       0.00%
Tranche 14        
Exercise price (US$)       $ 20
Average risk-free interest rate       1.55%
Expected option life (year)       10 years
Volatility rate       65.37%
Dividend yield       0.00%
Tranche 15        
Exercise price (US$)       $ 20.7
Average risk-free interest rate       1.94%
Expected option life (year)       5 years
Volatility rate       63.87%
Dividend yield       0.00%
Tranche 16        
Exercise price (US$)       $ 16.5
Average risk-free interest rate       1.94%
Expected option life (year)       5 years
Volatility rate       52.40%
Dividend yield       0.00%
Tranche 17        
Exercise price (US$)       $ 8
Average risk-free interest rate       2.26%
Expected option life (year)       5 years
Volatility rate       63.20%
Dividend yield       0.00%
Tranche 18        
Exercise price (US$)       $ 9.1
Average risk-free interest rate       2.25%
Expected option life (year)       5 years
Volatility rate       64.60%
Dividend yield       0.00%
Tranche 19        
Exercise price (US$)       $ 8.2
Average risk-free interest rate       2.58%
Expected option life (year)       5 years
Volatility rate       68.20%
Dividend yield       0.00%
Tranche 20        
Exercise price (US$)       $ 5.19
Average risk-free interest rate       2.49%
Expected option life (year)       5 years
Volatility rate       103.00%
Dividend yield       0.00%
Tranche 21        
Exercise price (US$)   $ 13.99 $ 5.3 $ 5.3
Average risk-free interest rate       1.67%
Expected option life (year)       5 years
Volatility rate       52.60%
Dividend yield       0.00%
Tranche 22        
Exercise price (US$)       $ 15.85
Average risk-free interest rate       0.87%
Expected option life (year)       5 years
Volatility rate       109.90%
Dividend yield       0.00%
Tranche 23        
Exercise price (US$)       $ 7.23
Average risk-free interest rate       1.37%
Expected option life (year)       5 years
Volatility rate       100.95%
Dividend yield       0.00%