Supplementary Cash Flow Information - Net Income Taxes and Interest Paid (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Income taxes	$ (9,827,433)	$ (3,290,247)	$ 3,050,000
Interest	$ 321,585	$ 1,280,352	$ 1,341,706