Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities - Additional Information (Detail)

v3.20.2
Marketable Securities - Additional Information (Detail)
6 Months Ended
Jun. 30, 2020
USD ($)
Security
Dec. 31, 2019
USD ($)
Marketable Securities [Abstract]    
Marketable securities   $ 0
Maturity period classified current investments less than one year  
Number of securities in unrealized loss position for less than one year | Security 13  
Aggregate fair value of debt securities $ 16,218,619