Common Stock - Common Stock Warrants - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Class of Warrant or Right [Line Items]
Proceeds from exercise of warrants	$ 236,000
Warrants Issued in December 2019 [Member]
Class of Warrant or Right [Line Items]
Warrants to purchase common stock	31,467
Exercise price per unit of warrant	$ 6.600
Proceeds from exercise of warrants	$ 200,000
Number of warrants exercised		0
Warrants Issued in April 2020 [Member]
Class of Warrant or Right [Line Items]
Warrants to purchase common stock	3,750
Exercise price per unit of warrant	$ 7.32
Proceeds from exercise of warrants	$ 27,450