Stockholders' Equity (Deficit) - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions			1 Months Ended	3 Months Ended	6 Months Ended		9 Months Ended
	Jan. 02, 2024	Apr. 25, 2022	Jan. 31, 2024	Jun. 30, 2024	Jun. 30, 2024	Jun. 30, 2023	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2020	May 31, 2020	Jul. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Authorized capital stock				520,000,000	520,000,000			520,000,000
Common stock, par value				$ 0.0001	$ 0.0001			$ 0.0001
Common stock, shares authorized				500,000,000	500,000,000			500,000,000
Preferred stock, par value				$ 0.0001	$ 0.0001			$ 0.0001
Preferred stock, shares authorized				20,000,000	20,000,000			20,000,000
Preferred stock, shares outstanding				0	0			0
Common stock value remaining to be sold				$ 88.7	$ 88.7
Shares of common stock, reserved for issuance				1,329,324	1,329,324
2014 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock, reserved for issuance				819,558	819,558
2024 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock, reserved for issuance				294,882	294,882
Additional shares of common stock, reserved for issuance				40,000	40,000
Inducement Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock, reserved for issuance				174,694	174,694
Outstanding options and RSUs				59,355	59,355
Aggregate number of awards available for grant to be issued				115,339	115,339
Additional shares of common stock, reserved for issuance				60,000	60,000
Restricted Stock Units (RSUs) | 2014 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock-based compensation weighted average recognition period					1 year 6 months
Unrecognized stock-based compensation				$ 23.8	$ 23.8
Employee Stock Option | 2014 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock-based compensation weighted average recognition period					1 year 6 months
Unrecognized stock-based compensation				$ 9.3	$ 9.3
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of employees purchase price of common stock					100.00%
Minimum [Member] | Employees And Non Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, vesting period					3 years
Stock option granted description terms					the exercise price of an option granted to a 10% shareholder cannot be less than 110% of the estimated fair value of the shares on the date of grant. Options granted generally vest over three or four years and expire in seven to ten years.
Share based compensation award expiration period					7 years
Maximum [Member] | Restricted Stock Units (RSUs) | From Date Of Grant
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, vesting period							4 years
Maximum [Member] | Employees And Non Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, vesting period					4 years
Share based compensation award expiration period					10 years
Warrant | May 2020 Warrants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of warrants issued			1,090,907
Underwritten Public Offering | 2019 Warrants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants outstanding								101,089
Underwritten Public Offering | Warrant
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of warrants issued											117,801
Number of securities called by each warrant			1,000								1
Warrants, exercise price			$ 0.0025								$ 0.0025
Warrants, term		7 years
Maximum ownership Percentage			9.99%		9.99%
Exercise of pre-funded warrants, Share					1,090,907
Underwritten Public Offering | Warrant | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Prior notice period		61 days	61 days
Underwritten Public Offering | Warrant | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum ownership Percentage			19.99%	19.99%
Underwritten Public Offering | Warrant | December 2020 Warrants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of warrants issued									81,632
Warrants outstanding				55,387	55,387
Underwritten Public Offering | Warrant | May 2020 Warrants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of warrants issued										114,678
Warrants outstanding				38,735	38,735
Direct Registered Offering
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares Issued, Price Per Share			$ 13.7475
Proceeds from sale of pre-funded warrants to purchase common stock, gross	$ 15.0
Proceeds from sale of pre-funded warrants to purchase common stock, net	$ 14.8
At The Market Offering | Cowen
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock aggregate offering price				$ 100.0	$ 100.0
Percentage of commission to be paid on gross sales proceeds of common stock sold					3.00%
Common stock, shares issued					492,855,000	5,917,000
Common stock average price					$ 19.23	$ 116
Proceeds from sale of pre-funded warrants to purchase common stock, gross					$ 9.5	$ 0.7
Proceeds from sale of pre-funded warrants to purchase common stock, net					$ 9.3	$ 0.6