Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Summary of Investments (Details)

v3.20.1
Summary of Significant Accounting Policies - Summary of Investments (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Accounting Policies [Abstract]    
Short-term investments: Available- for-sale investments $ 3,150,332 $ 2,878,664