Revenues - Narrative (Detail) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Revenue from Contract with Customer [Abstract]
Customer prepayments, deferred revenue	$ 0.7	$ 1.2
Unearned grant income	$ 0.0	$ 0.4

Contract with Customer, Liability, Customer Prepayments

No definition available.

Name:	osur_ContractWithCustomerLiabilityCustomerPrepayments
Namespace Prefix:	osur_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant