Income Taxes - Schedule of Income (Loss) from Continuing Operations before Income Tax, Domestic and Foreign (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
US operations	$ (3,345,925)	$ (9,315,082)
Foreign operations	(361,522)	(527,590)
Total	$ (3,707,447)	$ (9,842,672)