Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Additional Information (Detail)

v3.19.2
Significant Accounting Policies - Additional Information (Detail) - USD ($)
Jun. 30, 2019
Dec. 31, 2018
Accounting Policies [Abstract]    
Uninsured portion of cash balance $ 25,469,626 $ 19,958,301