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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Stock issued (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 9 Months Ended
Jun. 27, 2022
Jan. 26, 2022
Jun. 12, 2020
Jun. 04, 2020
Jan. 28, 2020
Feb. 28, 2021
Jun. 30, 2020
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Sale of stock                    
Common Stock, par value (in dollars per share)               $ 0.0001   $ 0.0001
Proceeds from stock issuance, net of cash issuance costs                 $ 74,420  
Common And Pre-Funded Warrants                    
Sale of stock                    
Warrants term 5 years                  
Secondary Public Offering, 2020                    
Sale of stock                    
Issue price (in dollars per share)         $ 45.50          
Proceeds from stock issuance, net of cash issuance costs         $ 134,100          
Secondary Public Offering, Excluding Underwriters' Option                    
Sale of stock                    
Issuance of common stock (in shares)         2,741,489          
Secondary Public Offering, Underwriters' Option                    
Sale of stock                    
Issuance of common stock (in shares)         411,223          
Shelf Registration Statement                    
Sale of stock                    
Maximum value of shares authorized to be sold in stock offering       $ 300,000            
Goldman Equity Distribution Agreement                    
Sale of stock                    
Maximum value of shares authorized to be sold in stock offering     $ 100,000       $ 100,000      
Maximum amount to be paid to sales agent (as a percent)             3.00%      
February Offering, 2021                    
Sale of stock                    
Issuance of common stock (in shares)           3,450,000        
Issue price (in dollars per share)           $ 23.00        
Proceeds from stock issuance, net of cash issuance costs           $ 74,400        
February Offering Underwriters' Option                    
Sale of stock                    
Issuance of common stock (in shares)           450,000        
Cowen Equity Distribution Agreement                    
Sale of stock                    
Issuance of common stock (in shares)               0    
Maximum value of shares authorized to be sold in stock offering   $ 100,000                
Maximum amount to be paid to sales agent (as a percent)   3.00%                
June Offering                    
Sale of stock                    
Issuance of common stock (in shares) 20,000,000                  
Common Stock, par value (in dollars per share) $ 0.0001                  
Issue price per share and accompanying warrant (in dollars per share) 1.00                  
Issue price per pre-funded warrant and accompanying warrant (in dollars per share) $ 0.9999                  
Proceeds from issuance of shares and pre-funded warrants, net $ 27,800                  
June Offering | Common And Pre-Funded Warrants                    
Sale of stock                    
Warrants term 5 years                  
Threshold percentage of aggregate beneficial ownership of holder for exercising warrants 9.99%                  
Threshold percentage of aggregate beneficial ownership of holder (together with affiliates) for exercising warrants 19.99%                  
June Offering | Pre-Funded Warrants                    
Sale of stock                    
Warrants to purchase common stock (in shares) 10,000,000                  
Warrants term               5 years    
June Offering | Common Warrants                    
Sale of stock                    
Warrants to purchase common stock (in shares) 30,000,000                  
Warrants term               5 years