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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
August 2022 Offering [Member]
March 2023 PIPE [Member]
Common Stock [Member]
Common Stock [Member]
August 2022 Offering [Member]
Common Stock [Member]
March 2023 Offering [Member]
Common Stock [Member]
March 2023 PIPE [Member]
Additional Paid-In Capital [Member]
Additional Paid-In Capital [Member]
August 2022 Offering [Member]
Additional Paid-In Capital [Member]
March 2023 PIPE [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive (Loss) Income [Member]
Non-Controlling Interest [Member]
Stockholders Equity, Beginning Balance at Dec. 31, 2021 $ 31,196     $ 63       $ 257,515     $ (226,485)   $ 103
Stockholders Equity, Beginning Balance (Accounting Standards Update 2020-06 Retrospective [Member]) at Dec. 31, 2021 $ 3,392             19,390     (15,998)    
Stockholders Equity, Beginning Balance, Shares at Dec. 31, 2021       554,609                  
Accounting Standards Update [Extensible Enumeration] Accounting Standards Update 2020-06 [Member]                        
Issuance of shares related to August 2022 pre-funded warrants exercise 0                        
Issuance of shares   $ 1,176     $ 2       $ 1,174        
Issuance of shares, Shares         61,250                
Offering costs   $ (365)             $ (365)        
Issuance of shares related to employee stock purchase plan $ 7             7          
Issuance of shares related to employee stock purchase plan, Shares       220                  
Stock-based compensation 1,106             1,106          
Net loss (15,612)                   (15,376)   (236)
Stockholders Equity, Ending Balance at Dec. 31, 2022 $ 20,900     $ 65       278,827     (257,859)   (133)
Stockholders Equity, Ending Balance, Shares at Dec. 31, 2022       616,079                  
Issuance of shares related to August 2022 pre-funded warrants exercise (482,647)                        
Issuance of shares     $ 4,740       $ 0     $ 4,740      
Issuance of shares, Shares         56,813 425,834 165,500            
Modification of warrants related to March 2023 PIPE     $ 219             $ 219      
Unrealized gains on available-for-sale securities                       $ 101  
Issuance of shares related to exercise of Service and Performance Warrants $ 0             0          
Issuance of shares related to reverse stock split, Shares 19,118     19,118                  
Issuance of shares related to employee stock purchase plan $ 12             12          
Issuance of shares related to employee stock purchase plan, Shares       1,993                  
Stock-based compensation 717             717          
Net loss (13,986)                   (13,981)   (5)
Stockholders Equity, Ending Balance at Dec. 31, 2023 $ 12,703     $ 65       $ 284,515     $ (271,840) $ 101 $ (138)
Stockholders Equity, Ending Balance, Shares at Dec. 31, 2023       1,285,337