Preferred Stock, Common Stock and Stockholders' Equity - Warrants - Additional Information (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Warrants converted to purchase of common stock	871,682
Issuance of common stock from warrant exercise	381,625
Weighted average exercise price of warrants exercised	$ 2.77
Warrants outstanding to purchase common stock	1,841,879	2,713,561
Weighted average exercise price of warrants outstanding	$ 2.98	$ 2.91
Weighted average remaining contractual term of outstanding warrants	1 year 14 days