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Fair Value Measurements (Details) - USD ($)
Sep. 30, 2021
Dec. 31, 2020
Fair Value Measurements    
Fair value assets, amount transferred between measurement levels $ 0 $ 0
Fair value liabilities, amount transferred between measurement levels 0 0
Recurring | U.S. corporations    
Fair Value Measurements    
Total 945,066 1,909,368
Recurring | Significant Other Observable Inputs (Level 2) | U.S. corporations    
Fair Value Measurements    
Total $ 945,066 $ 1,909,368