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Stock Warrants - summary of all warrant activity (Details) - $ / shares
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Stock Warrants      
Number of Warrants, Beginning balance 634,426 634,497  
Number of Warrants, Forfeited (634,426) (71)  
Number of Warrants, Ending balance   634,426 634,497
Weighted Average Exercise Price, Beginning balance $ 1.22 $ 1.24  
Weighted Average Exercise Price, Forfeited $ 1.22 182  
Weighted Average Exercise Price, Ending balance   $ 1.22 $ 1.24
Weighted Average Remaining Contractual Life (in years)   9 months 10 days 1 year 9 months 10 days