Quarterly report pursuant to Section 13 or 15(d)

SHAREHOLDERS' EQUITY - Changes in Shareholders' Equity (Details)

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SHAREHOLDERS' EQUITY - Changes in Shareholders' Equity (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Oct. 15, 2021
Nov. 30, 2021
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Jun. 30, 2022
Balance     $ 153,090 $ 21,559 $ 149,471 $ 26,099 $ 26,099
Underwriting commissions, discounts and other equity offering costs       (3,449) (759) (4,136)  
Share-based compensation     1,731 1,009 3,610 1,851  
Net loss     (13,556) (12,593) (23,387) (20,429) (41,100)
Balance     141,265 62,265 141,265 62,265 149,471
2021 Pre-Funded Warrants.              
Gross proceeds from issuance of common stock for cash       10,783      
2021 Underwritten Public Offering              
Gross proceeds from issuance of common stock for cash       39,956   39,956  
Gross proceeds from issuance of common stock for cash (in shares) 6,030,847 116,266          
2021 Underwritten Public Offering | 2021 Pre-Funded Warrants.              
Gross proceeds from issuance of common stock for cash           10,783  
Registered Direct Offering 2021 [Member]              
Gross proceeds from issuance of common stock for cash       5,000   5,000  
Gross proceeds from issuance of common stock for cash (in shares) 769,231            
Common Stock              
Balance     $ 37 $ 9 $ 34 $ 8 $ 8
Balance (in shares)     36,827,000 8,640,000 33,582,000 8,352,000 8,352,000
Balance     $ 37 $ 16 $ 37 $ 16 $ 34
Balance (in shares)     36,827,000 15,556,000 36,827,000 15,556,000 33,582,000
Common Stock | 2021 Underwritten Public Offering              
Gross proceeds from issuance of common stock for cash       $ 6   $ 6  
Gross proceeds from issuance of common stock for cash (in shares)       6,147,000   6,147,000  
Common Stock | Registered Direct Offering 2021 [Member]              
Gross proceeds from issuance of common stock for cash       $ 1   $ 1  
Gross proceeds from issuance of common stock for cash (in shares)       769,000   769,000  
Additional Paid-in Capital              
Balance     $ 372,082 $ 197,524 $ 358,635 $ 194,229 $ 194,229
Underwriting commissions, discounts and other equity offering costs       (3,449) (759) (4,136)  
Share-based compensation     1,731 1,009 3,610 1,851  
Balance     373,813 250,816 373,813 250,816 358,635
Additional Paid-in Capital | 2021 Pre-Funded Warrants.              
Gross proceeds from issuance of common stock for cash       10,783      
Additional Paid-in Capital | 2021 Underwritten Public Offering              
Gross proceeds from issuance of common stock for cash       39,950   39,950  
Additional Paid-in Capital | 2021 Underwritten Public Offering | 2021 Pre-Funded Warrants.              
Gross proceeds from issuance of common stock for cash           10,783  
Additional Paid-in Capital | Registered Direct Offering 2021 [Member]              
Gross proceeds from issuance of common stock for cash       4,999   4,999  
Accumulated Deficit              
Balance     (219,029) (175,974) (209,198) (168,138) (168,138)
Net loss     (13,556) (12,593) (23,387) (20,429)  
Balance     $ (232,585) $ (188,567) $ (232,585) $ (188,567) $ (209,198)