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STOCKHOLDERS' EQUITY (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Feb. 08, 2021
Jun. 08, 2020
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Jun. 10, 2022
Jan. 12, 2022
Jan. 11, 2022
Dec. 31, 2021
Sep. 22, 2021
Apr. 22, 2018
Common Stock                        
Common stock, shares authorized     300,000,000   300,000,000         300,000,000    
Common stock, par or stated value per share     $ 0.000041666   $ 0.000041666         $ 0.000041666    
Common stock, shares issued     157,840,581   157,840,581         157,004,742    
Common stock, shares outstanding     157,840,581   157,840,581         157,004,742    
Proceeds from the issuance of common stock, net         $ 0 $ 203,156            
Weighted average grant date fair value, options granted         $ 8.78 $ 23.29            
Common Stock                        
Common Stock                        
Common stock issued, net of offering costs (in shares)           6,474,099            
Common Stock | Issuance Of Common Stock Upon Conversion Of Preferred Stock                        
Common Stock                        
Conversion of stock, shares issued           738,961            
At the Market Offering Program                        
Common Stock                        
Maximum amount of shares to be issued $ 350,000                      
Maximum percentage of commission 3.00%                      
Common stock issued, net of offering costs (in shares)     0 0 0 6,474,099            
Proceeds from the issuance of common stock, net           $ 203,200            
Weighted average price           $ 32.12            
Series A Convertible Preferred Stock                        
Common Stock                        
Preferred stock, shares authorized     17,000   17,000         17,000    
Preferred stock, par or stated value per share     $ 0.001   $ 0.001         $ 0.001    
Conversion of Stock, shares converted     0 0 0 0            
Conversion of stock, shares issued         500              
Preferred stock, shares outstanding     194   194         194    
Series A Convertible Preferred Stock | Common Stock                        
Common Stock                        
Common stock available in conversion, shares     97,000   97,000         97,000    
Series A Convertible Preferred Stock | Private Placement                        
Common Stock                        
Preferred stock, par or stated value per share     $ 1,000   $ 1,000              
Convertible price per share         $ 2.00              
Series B Convertible Preferred Stock                        
Common Stock                        
Preferred stock, shares authorized     11,500,000   11,500,000         11,500,000    
Preferred stock, par or stated value per share     $ 0.001   $ 0.001         $ 0.001    
Conversion of stock, shares issued         1              
Preferred stock, shares outstanding     2,842,158   2,842,158         2,842,158    
Series B Convertible Preferred Stock | Issuance Of Common Stock Upon Conversion Of Preferred Stock                        
Common Stock                        
Conversion of stock, shares issued     0 0 0 738,961            
Series B Convertible Preferred Stock | Common Stock                        
Common Stock                        
Preferred stock, shares outstanding     2,842,158   2,842,158         2,842,158    
Series B Convertible Preferred Stock | IPO                        
Common Stock                        
Preferred stock, par or stated value per share     $ 4.75   $ 4.75              
Convertible price per share         $ 4.75              
Blank check                        
Common Stock                        
Preferred stock, shares authorized     50,000,000   50,000,000              
Stock option                        
Common Stock                        
Unrecognized compensation cost     $ 71,100   $ 71,100              
Unrecognized compensation cost recognition period         1 year 10 months 2 days              
RSUs and PRSUs                        
Common Stock                        
Unrecognized compensation cost recognition period         1 year 10 months 9 days              
Unrecognized compensation cost     26,000   $ 26,000              
Aggregate intrinsic value of outstanding non-vested RSUs & PRSUs     $ 23,500   $ 23,500              
Vested         894,760              
2014 Equity Incentive Plan                        
Common Stock                        
Number of shares available     8,954   8,954              
The 2018 Plan                        
Common Stock                        
Number of shares available     7,273,608   7,273,608              
Shares authorized   14,000,000                   6,000,000
Common Stock, Capital Shares Reserved for Future Issuance             20,700,000          
2020 ESPP                        
Common Stock                        
Common stock issued, net of offering costs (in shares)         80,203              
Shares authorized   500,000                    
Percentage of purchase price   85.00%                    
Stock-based compensation expense     $ 400 $ 200 $ 900 $ 1,000            
Unrecognized compensation cost     $ 400   $ 400              
Unrecognized compensation cost recognition period         2 months 9 days              
2021 Inducement Plan                        
Common Stock                        
Number of shares available     55,775   55,775              
Shares authorized               1,750,000 1,000,000   1,000,000