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Revenue Recognition - Summary of Product Revenue Allowance and Reserve Categories (Detail) - HEPLISAV-B $ in Thousands	9 Months Ended
	Sep. 30, 2025 USD ($)
Accounts receivable reserves
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 9,317
Provisions related to current period sales	69,176
Credit or payments made during the period	(66,495)
Adjustments	(2)
Balance at End of Period	11,996
Revenue Reserve Accruals
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	31,479
Provisions related to current period sales	46,346
Credit or payments made during the period	(42,590)
Adjustments	(11,187)
Balance at End of Period	$ 24,048