Basis of Presentation - Additional Information (Detail) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Present value of remaining minimum lease payments	$ 1,761,000
Incremental borrowing rate	5.75%
Derecognized Deferred Rent	$ 540,000
Operating Lease, Right-of-Use Asset	1,045,339	$ 0
ASU 2016-02 | Restatement Adjustment
Present value of remaining minimum lease payments	1,700,000
Operating Lease, Right-of-Use Asset	$ 1,200,000