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Leases - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
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
Lease cost	$ 368		$ 1,097
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		8 years

X

- Definition

Lessee operating and finance lease existence of option to extend.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

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

+ References

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+ Details

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X

- Definition

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

+ References

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+ Details

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X

- Definition

Lessee, operating and financing lease, remaining lease term.

+ References

No definition available.

+ Details

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Namespace Prefix:	osur_
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Period Type:	duration

X

- Definition

Amount of lease cost recognized by lessee for lease contract.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 55
-Paragraph 53
-URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971

+ Details

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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

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