Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2015	Jan. 01, 2024	Nov. 20, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value of options exercised	$ 0	$ 476	$ 118
Options granted	253,760
Excess tax benefits from stock option activity or stock-based compensation expense recognized in cash flows from operations	$ 0	$ 0	$ 0
Board of Directors Chairman [Member] | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awarded			990
2014 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized		1,016,919			1,153,120
Number of stock options that may be granted after the tenth anniversary of the 2014 Plan	0
Annual increases in number of shares reserved for issuance as a percentage of shares of capital stock outstanding through January 1, 2024				3.00%
2014 Equity Incentive Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of awards granted	10 years
2014 Equity Incentive Plan [Member] | Maximum [Member] | Incentive Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized				2,500,000
2014 Equity Incentive Plan [Member] | Director [Member] | Incentive Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of awards granted	3 years
2014 Equity Incentive Plan [Member] | Employee And Nonemployee Consultants [Member] | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awarded	75,323	50,098	39,517
2014 Equity Incentive Plan [Member] | Employee And Nonemployee Consultants [Member] | Share-Based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of vested shares on first anniversary of grant date	25.00%
2014 Equity Incentive Plan [Member] | Employee And Nonemployee Consultants [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of awards granted	36 months
2014 Equity Incentive Plan [Member] | Employee And Nonemployee Consultants [Member] | Share Based Compensation Subsequent Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of awards granted	4 years
2014 Equity Incentive Plan [Member] | Employees And Non-Employee Members Of Board Of Directors [Member] | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of options granted	$ 7.92	$ 69	$ 87
Options granted	253,760	167,056	158,327
Compensation expense not yet recognized	$ 4,146
Weighted average period of compensation expense not yet recognized	10 months 2 days
2014 Equity Incentive Plan [Member] | Employees And Non-Employee Members Of Board Of Directors [Member] | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awarded	75,323
Restricted stock units, grant date fair value	$ 7.92	$ 93.72	$ 121.2
Restricted stock units, vested	31,170
2014 Equity Incentive Plan [Member] | Consultants | Employee Stock Option | Nonemployee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted	0	0	0
2019 Inducement Plan [Member] | Incentive Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted	0	0	0
2019 Inducement Plan [Member] | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awarded	0	0	0
2019 Inducement Plan [Member] | Share-Based Compensation Award, Tranche One [Member] | Share-based Payment Arrangement, Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of vested shares on first anniversary of grant date	25.00%
2019 Inducement Plan [Member] | Share-based Compensation Award, Tranche Two [Member] | Share-based Payment Arrangement, Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of awards granted	36 months
2019 Inducement Plan [Member] | Share Based Compensation Subsequent Awards [Member] | Share-based Payment Arrangement, Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of awards granted	4 years
2019 Inducement Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized						25,000