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Earnings per Share - Computation of basic and diluted earnings per share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Numerator:        
Net (loss) $ (3,922) $ (2,907) $ (22,268) $ (13,290)
Weighted-average shares outstanding, basic and diluted        
Basic - Class A Common Stock 11,966,928 514,946 6,257,476 5,292,384
Diluted - Class A and Class B Common Stock 11,966,928 514,946 6,257,476 5,292,384
Basic Net loss per share attributable to common stockholders $ (0.33) $ (5.65) $ (3.56) $ (2.51)
Diluted Net loss per share attributable to common stockholders $ (0.33) $ (5.65) $ (3.56) $ (2.51)