Quarterly report pursuant to Section 13 or 15(d)

Recent Transactions - Equity Transactions - Additional Information (Detail)

v3.19.3
Recent Transactions - Equity Transactions - Additional Information (Detail) - USD ($)
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Summary Of Investments Other Than Investments In Related Parties [Abstract]    
Business combination acquisition related costs $ 48,000 $ 200,000