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Leases - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2021
Lessee Lease Description [Line Items]
Lessee operating and financing lease existence of option to terminate	true
Lessee operating and financing leases, period of options to terminate	1 year
Lessee, operating and finance lease, existence of option to extend	true
Minimum [Member]
Lessee Lease Description [Line Items]
Operating and financing leases, remaining lease terms	1 year
Maximum [Member]
Lessee Lease Description [Line Items]
Operating and financing leases, remaining lease terms	7 years

X

- Definition

Lessee operating and finance lease existence of option to extend.

+ References

No definition available.

+ Details

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Namespace Prefix:	osur_
Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Lessee, operating and finance leases, period of options to terminate.

+ References

No definition available.

+ Details

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Namespace Prefix:	osur_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Lessee, operating and financing lease existence of option to terminate.

+ References

No definition available.

+ Details

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Namespace Prefix:	osur_
Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Lessee, operating and financing lease, remaining lease term.

+ References

No definition available.

+ Details

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Namespace Prefix:	osur_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LesseeLeaseDescriptionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: