Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Assets:
Fair Value	$ 32,038	$ 37,659
U.S. Treasury and Government Agencies [Member]
Assets:
Fair Value	5,993	6,718
Corporate Debt [Member]
Assets:
Fair Value	16,707	19,302
Asset-Backed Securities [Member]
Assets:
Fair Value	7,538	10,438
Commercial Paper [Member]
Assets:
Fair Value	0
Yankee CD [Member]
Assets:
Fair Value	1,800	1,201
Fair Value, Recurring [Member]
Assets:
Total assets	35,108	45,495
Fair Value, Recurring [Member] \| Money Market Funds [Member]
Assets:
Cash equivalents	2,771	7,836
Fair Value, Recurring [Member] \| U.S. Treasury and Government Agencies [Member]
Assets:
Fair Value	5,993	6,718
Fair Value, Recurring [Member] \| Corporate Debt [Member]
Assets:
Fair Value	16,707	19,302
Fair Value, Recurring [Member] \| Asset-Backed Securities [Member]
Assets:
Fair Value	7,538	10,438
Fair Value, Recurring [Member] \| Commercial Paper [Member]
Assets:
Cash equivalents	299
Fair Value, Recurring [Member] \| Yankee CD [Member]
Assets:
Fair Value	1,800	1,201
Fair Value, Recurring [Member] \| Level 1 [Member]
Assets:
Total assets	8,269	14,054
Fair Value, Recurring [Member] \| Level 1 [Member] \| Money Market Funds [Member]
Assets:
Cash equivalents	2,771	7,836
Fair Value, Recurring [Member] \| Level 1 [Member] \| U.S. Treasury and Government Agencies [Member]
Assets:
Fair Value	5,498	6,218
Fair Value, Recurring [Member] \| Level 2 [Member]
Assets:
Total assets	26,839	31,441
Fair Value, Recurring [Member] \| Level 2 [Member] \| U.S. Treasury and Government Agencies [Member]
Assets:
Fair Value	495	500
Fair Value, Recurring [Member] \| Level 2 [Member] \| Corporate Debt [Member]
Assets:
Fair Value	16,707	19,302
Fair Value, Recurring [Member] \| Level 2 [Member] \| Asset-Backed Securities [Member]
Assets:
Fair Value	7,538	10,438
Fair Value, Recurring [Member] \| Level 2 [Member] \| Commercial Paper [Member]
Assets:
Cash equivalents	299
Fair Value, Recurring [Member] \| Level 2 [Member] \| Yankee CD [Member]
Assets:
Fair Value	$ 1,800	$ 1,201