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Summary of Significant Accounting Policies - Reconciliation of Numerators and Denominators used in Computing Basic and Diluted Net Income Per Share (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accounting Policies [Abstract]
Net income (loss)	$ (1,167,886)	$ (1,744,762)
Numerator, basic and diluted net income (loss) available to stockholders	$ (1,167,886)	$ (1,744,762)
Shares used in computation - basic:
Weighted average common shares outstanding	9,222,199	8,466,909
Common shares outstanding for basic	9,222,199	8,466,909
Additional shares used in computation – diluted:
Common shares outstanding for basic	9,222,199	8,466,909
Shares used in computing diluted net income per share	9,222,199	8,466,909
Net (loss) per share - basic	$ (0.13)	$ (0.21)
Net (loss) per share - diluted	$ (0.13)	$ (0.21)

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