Net Income (Loss) per Share - Computation of Basic and Diluted Net Income (Loss) per Share Attributable to Common Stockholders (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Net income (loss) applicable to common stockholders	$ (2,184,309)	$ 1,146,740
Denominator:
Weighted average common shares outstanding, basic	19,244,634	18,504,993
Effect of dilutive common shares		907,692
Weighted average common shares outstanding, diluted	19,244,634	19,412,685
Net income (loss) per share applicable to common stockholders
Basic	$ (0.11)	$ 0.06
Diluted	$ (0.11)	$ 0.06
Anti-dilutive securities excluded from diluted net income (loss) per share:
Anti-dilutive securities excluded from diluted net income (loss) per share	75,157	984,768
Stock options [Member]
Anti-dilutive securities excluded from diluted net income (loss) per share:
Anti-dilutive securities excluded from diluted net income (loss) per share	75,157	984,768