Quarterly report pursuant to Section 13 or 15(d)

Investments in Non-Marketable Securities - Textual (Details)

v3.21.1
Investments in Non-Marketable Securities - Textual (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Marketable Securities [Line Items]    
Interest income from amortization of discount $ 100,000 $ 0
Other expenses 68,000 0
Unrealized or realized gains or losses 0 0
Security Owned Not Readily Marketable MAI [Member]    
Marketable Securities [Line Items]    
Unrealized or realized gains or losses $ 0 $ 0