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STOCK-BASED COMPENSATION - Stock-Based Compensation Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Stock-based compensation expense      
Stock-based compensation expense $ 339,226 $ 152,906 $ 108,483
Cost of sales      
Stock-based compensation expense      
Stock-based compensation expense 16,835 12,852 5,799
Research and development      
Stock-based compensation expense      
Stock-based compensation expense 49,723 19,976 17,196
General and administrative      
Stock-based compensation expense      
Stock-based compensation expense 216,952 75,999 64,222
Sales and marketing      
Stock-based compensation expense      
Stock-based compensation expense $ 55,716 $ 44,079 $ 21,266