Financial Instruments - Summary of Money Market Funds and Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 5,438	$ 9,752
Unrealized Loss	(1)	(1)
Estimated Fair Value	5,437	9,751
Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	552	688
Estimated Fair Value	552	688
Certificates of deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	150	150
Estimated Fair Value	150	150
Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,736	8,914
Unrealized Loss	(1)	(1)
Estimated Fair Value	4,735	8,913
Cash and cash equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	5,288	8,810
Unrealized Loss	(1)	(1)
Estimated Fair Value	5,287	8,809
Short-term investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		792
Estimated Fair Value		792
Long Term Restricted Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	150	150
Estimated Fair Value	$ 150	$ 150

Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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