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Fair Value Measurements - Assets/Liabilities Measured at Fair Value (Details) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Oct. 22, 2022
Dec. 31, 2020
Sep. 30, 2021
Mar. 31, 2021
Sep. 30, 2022
Dec. 31, 2021
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]            
Cash and cash equivalents         $ 29,752 $ 21,100
Processa common shares         $ 114 240
6 month interval            
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]            
Shares to be issued under agreement         41  
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  
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  
Liquidity discount (as a percent)     40.00%   15.00%  
Quoted Price in Active Markets for Identical Instruments Level 1 [Member]            
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]            
Cash and cash equivalents         $ 438 82
Significant Other Observable Inputs Level 2 [Member]            
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]            
Cash and cash equivalents         29,314 21,018
Processa common shares         $ 114 $ 240
Processa Pharmaceuticals, Inc            
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]            
Shares to be issued under agreement         46  
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