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Liquidity and Going Concern - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
May 09, 2024
Mar. 08, 2024
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                  
Net loss     $ (2,940,000) $ (3,261,000) $ (1,482,000) $ (4,805,000) $ (6,201,000) $ (6,287,000)  
Accumulated deficit     (486,702,000)       (486,702,000)   $ (480,501,000)
Aggregate upfront gross proceeds from private placement $ 7,300,000                
Net cash used in operating activities             $ (5,663,000) $ (8,571,000)  
Stockholders' equity requirement   $ 2,500,000 $ 1,000   $ 1,328,000 $ 895,000      
Net income from continuing operations   500,000              
Maintain minimum market value of listed securities   $ 35,000,000