Related Party Transactions - Additional Information (Detail) - PBM Capital Group, LLC [Member] - USD ($)				1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 01, 2019	Jan. 01, 2019	Dec. 02, 2015	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Related Party Transaction [Line Items]
Services agreement initial term			12 months
Expenses incurred under services agreement					$ 79,000	$ 150,000	$ 237,000	$ 307,500
Service Agreement [Member]
Related Party Transaction [Line Items]
Monthly management fee payable			$ 2,500
Amended Service Agreement [Member]
Related Party Transaction [Line Items]
Monthly management fee payable		$ 26,333		$ 50,000
Amended Service Agreement [Member] | Subsequent Event [Member]
Related Party Transaction [Line Items]
Monthly management fee payable	$ 5,000