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Nature of Operations, Background, and Basis of Presentation - Liquidity and Management's Plans (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Oct. 31, 2023
Dec. 31, 2021
Nature of Operations, Background, and Basis of Presentation [Abstract]          
Net Income (Loss)   $ (21,052) $ (4,018)    
Non-cash expenses   9,000 8,200    
Accumulated deficit   (53,849) (32,797)    
Net cash used in operating activities   (6,545) (14,182)    
Working capital, Net   2,100 8,800    
Cash and cash equivalents   2,998 $ 4,608   $ 5,222
Reduction in payroll costs   6,000      
Reduction in operating expenses   9,000      
Term loan debt   $ 5,000   $ 5,000  
Total net proceeds from the sale of shares $ 2,000