Stockholders' Equity - Additional Information (Detail)					1 Months Ended		3 Months Ended		12 Months Ended					13 Months Ended	15 Months Ended	20 Months Ended	24 Months Ended
	Mar. 18, 2022 USD ($)	Jul. 28, 2021 USD ($)	Mar. 17, 2020 USD ($)	Sep. 28, 2017 USD ($) shares	May 31, 2015 USD ($) $ / shares shares	Feb. 28, 2014 Tranche $ / shares shares	Mar. 31, 2023 USD ($) $ / shares shares	Mar. 31, 2022 USD ($) shares	Dec. 31, 2022 $ / shares shares	Dec. 31, 2021 shares	Dec. 31, 2020 shares	Dec. 31, 2019 shares	Dec. 31, 2018 shares	Mar. 31, 2023 $ / shares shares	Dec. 31, 2016 USD ($)	Mar. 31, 2023 $ / shares shares	Mar. 17, 2022 shares	Feb. 20, 2014 USD ($)
Equity [Line Items]
Preferred stock, shares authorized							10,000,000		10,000,000					10,000,000		10,000,000
Preferred stock, par value | $ / shares							$ 0.00001		$ 0.00001					$ 0.00001		$ 0.00001
Preferred stock, shares outstanding							0		0					0		0
Common stock, shares authorized							300,000,000		300,000,000					300,000,000		300,000,000
Common stock, par value | $ / shares							$ 0.00001		$ 0.00001					$ 0.00001		$ 0.00001
Number of common stock for issuance in exchange for future services from founders						1,000,000
Common stock price per share | $ / shares						$ 0.01
Number of tranches | Tranche						2
Unrecognized compensation expense | $					$ 62,000													$ 168,000
Common stock shares repurchased					633,810
Repurchase of common stock from stockholders, per share | $ / shares					$ 0.00001
Remaining number of repurchased shares					366,190
Common stock sold							0		0	0	0	0	0
Shares issued under ESPP							0	0
ATM Agreement [Member]
Equity [Line Items]
Shelf registration statement expiry date		Aug. 11, 2021
2021 Shelf Registration Statement [Member]
Equity [Line Items]
Maximum amount of Securities that can be offered | $		$ 600,000,000.0
Common Stock [Member]
Equity [Line Items]
Common stock sold							178,204
Repurchase of common stock (in shares)								1,464,217
Common Stock [Member] | ATM Agreement [Member]
Equity [Line Items]
Gross proceeds from common stock issuance | $							$ 110,900,000
Common stock sold																1,587,404
Proceeds from issuance of common stock net | $		13,600,000
Repurchase Program [Member]
Equity [Line Items]
Repurchase of common stock (in shares)																	1,464,217
Stock repurchase program, additional maturity period			2 years
New Repurchase Program [Member]
Equity [Line Items]
Repurchase of common stock (in shares)														729,034
Stock repurchase program, additional maturity period	2 years
Maximum [Member] | Common Stock [Member] | ATM Agreement [Member]
Equity [Line Items]
Aggregate offering price, common stock | $		$ 125,000,000.0
Maximum [Member] | Repurchase Program [Member]
Equity [Line Items]
Purchase of common stock and warrants | $			$ 50,000,000.0
Maximum [Member] | New Repurchase Program [Member]
Equity [Line Items]
Purchase of common stock and warrants | $	$ 50,000,000.0
LPC [Member] | Commitment Purchase Agreement [Member] | Common Stock [Member] | Registration Rights Agreement [Member]
Equity [Line Items]
Common stock purchase agreement term				30 months
Common stock issued as consideration for commitment				100,000
Gross proceeds from common stock issuance | $				$ 802,000
Common stock sold				343,051
LPC [Member] | Maximum [Member] | Commitment Purchase Agreement [Member] | Common Stock [Member] | Registration Rights Agreement [Member]
Equity [Line Items]
Total of purchase agreement and potential aggregate future purchases | $				$ 15,000,000.0
Common stock to be sold, subject to certain limitations				75,000
Total purchase proceeds per purchase date, subject to certain limitations | $				$ 1,000,000.0
LPC [Member] | Minimum [Member] | Commitment Purchase Agreement [Member] | Common Stock [Member] | Registration Rights Agreement [Member]
Equity [Line Items]
Percentage of shares may not sell if it is beneficial owning				4.99%
Tranche One [Member]
Equity [Line Items]
Number of common stock for issuance in exchange for future services from founders						500,000
Remaining number of repurchased shares					183,095
Stock compensation expense | $							$ 0	$ 0							$ 31,000
Tranche Two [Member]
Equity [Line Items]
Number of common stock for issuance in exchange for future services from founders						500,000
Remaining number of repurchased shares					183,095