Summary of Series B Convertible Preferred Stock and Accretion of Dividend (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Stockholders Equity [Line Items]
Dividends earned on Series B preferred stock	$ 201	$ 319	$ 682	$ 947
Series B Convertible Preferred Stock
Stockholders Equity [Line Items]
Balance at beginning of period	27,070	25,951	26,589	25,323
Dividends earned on Series B preferred stock	201	319	682	947
Balance at end of period	$ 27,271	$ 26,270	$ 27,271	$ 26,270
Number of shares at beginning of period	6,767	6,488	6,647	6,331
Cumulative dividends on Series B convertible preferred stock	50	80	170	237
Number of shares at end of period	6,817	6,568	6,817	6,568