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Fair Value Measurements (Details) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Fair Value Measurements    
Fair value assets, amount transferred between measurement levels $ 0 $ 0
Fair value liabilities, amount transferred between measurement levels 0 0
Recurring    
Fair Value Measurements    
Total   2,768,287
Recurring | U.S. corporations    
Fair Value Measurements    
Total 2,320,407 2,287,809
Recurring | International corporations    
Fair Value Measurements    
Total   480,478
Recurring | Significant Other Observable Inputs (Level 2)    
Fair Value Measurements    
Total   2,768,287
Recurring | Significant Other Observable Inputs (Level 2) | U.S. corporations    
Fair Value Measurements    
Total $ 2,320,407 2,287,809
Recurring | Significant Other Observable Inputs (Level 2) | International corporations    
Fair Value Measurements    
Total   $ 480,478