Stock Based Compensation - Summary of Nonvested Stock option Activity (Detail)	3 Months Ended
	Mar. 31, 2021 $ / shares shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Nonvested at December 31, 2020 | shares	218,115
Granted | shares	28,350
Vested | shares	(11,923)
Forfeited | shares	0
Nonvested at March 31, 2021 | shares	234,542
Nonvested at December 31, 2020 | $ / shares	$ 1.98
Granted | $ / shares	2.76
Vested | $ / shares	1.83
Forfeited | $ / shares	0
Nonvested at March 31, 2021 | $ / shares	$ 2.06