Stockholder's Equity - Preferred Stock Narrative (Detail) - $ / shares	1 Months Ended	12 Months Ended
	May 31, 2018	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized shares of preferred stock (in shares)		5,000,000	5,000,000
Preferred stock, par value (in dollars per share)		$ 0.001
Preferred Stock Series A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized shares of preferred stock (in shares)		2,285,700
Preferred stock, par value (in dollars per share)		$ 0.001
Preferred stock converted (in shares)			2,093,155	0
Preferred shares outstanding (in shares)			0
Series B Non-Voting Convertible Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Preferred shares outstanding (in shares)		443	443
Sale and issue of preferred stock (in shares)	5,000
Purchase price of preferred stock (in dollars per share)	$ 10,000
Preferred Stock Series B
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock converted (in shares)		0
Preferred shares outstanding (in shares)		443
Conversion price (in dollars per share)	$ 1.80
Preferred stock conversion to common stock (in shares)	27,777,778
Preferred stock period of forced conversion (in days)		90 days