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Fair Value Measurements - Assets/Liabilities Measured at Fair Value (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Oct. 22, 2022
Dec. 31, 2020
Jan. 31, 2021
Aug. 31, 2020
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2022
Dec. 31, 2021
Oct. 30, 2020
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                  
Cash and cash equivalents             $ 14,915 $ 21,100  
Processa common shares             $ 148 240  
Share price                 $ 4.11
Liquidity discount (as a percent)             20.00%    
6 month interval                  
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                  
Shares to be issued under agreement             41,000    
Liquidity discount (as a percent)   20.00%         0.00%    
9 month interval                  
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                  
Shares to be issued under agreement             5,000    
Liquidity discount (as a percent)           30.00% 0.00%    
12 month interval                  
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                  
Shares to be issued under agreement             5,000    
Liquidity discount (as a percent)         40.00%   20.00%    
Quoted Price in Active Markets for Identical Instruments Level 1 [Member]                  
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                  
Cash and cash equivalents             $ 278 82  
Significant Other Observable Inputs Level 2 [Member]                  
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                  
Cash and cash equivalents             14,637 21,018  
Processa common shares             $ 148 $ 240  
Processa Pharmaceuticals, Inc                  
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                  
Shares to be issued under agreement       825,000     46,000    
License agreement | Processa Pharmaceuticals, Inc | Restricted shares                  
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                  
Shares to be issued under agreement     41            
License agreement | Processa Pharmaceuticals, Inc | Restricted shares | 12 month interval                  
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                  
Number of year after which shares will become unrestricted             1 year    
License agreement | Processa Pharmaceuticals, Inc | Forecast [Member] | Restricted shares                  
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                  
Shares to be issued under agreement 5,000