Preferred Stock, Common Stock and Stockholders' Equity - Summary of Estimated Fair Value of Shares to be Acquired under Employee Stock Purchase Plan (Detail) - Employee stock purchase plan [Member]	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk free interest rate	0.13%
Expected term	6 months	6 months
Expected volatility of common stock	111.98%
Expected dividend yield	0.00%	0.00%
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk free interest rate		0.13%
Expected volatility of common stock		69.72%
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk free interest rate		1.11%
Expected volatility of common stock		111.98%