Lessee, Operating Lease, Number of Parking Spaces

No definition available.

Name:	upwk_LesseeOperatingLeaseNumberOfParkingSpaces
Namespace Prefix:	upwk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Lessee, Operating Lease, Number Of Renewal Options

+ References

No definition available.

+ Details

Name:	upwk_LesseeOperatingLeaseNumberOfRenewalOptions
Namespace Prefix:	upwk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Lessee, Operating Lease, Number of Separate Leases

+ References

No definition available.

+ Details

Name:	upwk_LesseeOperatingLeaseNumberOfSeparateLeases
Namespace Prefix:	upwk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Lessee, Operating Lease, Number Of Suites

+ References

No definition available.

+ Details

Name:	upwk_LesseeOperatingLeaseNumberOfSuites
Namespace Prefix:	upwk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Operating Leases

+ References

No definition available.

+ Details

Name:	upwk_NumberOfOperatingLeases
Namespace Prefix:	upwk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Operating Lease, Rent Expense, Monthly

+ References

No definition available.

+ Details

Name:	upwk_OperatingLeaseRentExpenseMonthly
Namespace Prefix:	upwk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Area of a real estate property.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 970
-SubTopic 360
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-28(Column A)(Footnote 2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478979/970-360-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 970
-SubTopic 360
-Name Accounting Standards Codification
-Section 30
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478150/970-360-30-2

+ Details

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	instant

- 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

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

- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

Name:	us-gaap_LesseeOperatingLeaseRenewalTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-1

+ Details

Name:	us-gaap_OperatingLeaseLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-1

+ Details

Name:	us-gaap_OperatingLeaseRightOfUseAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	srt_StatementGeographicalAxis=upwk_LisbonPortugalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=upwk_PaloAltoCaliforniaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=upwk_BuildingSuite125Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=upwk_BuildingSuite302Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Leases (Details) $ in Thousands, € in Millions	1 Months Ended
Leases (Details) $ in Thousands, € in Millions	Feb. 28, 2026 USD ($) ft² lease renewalOption suite	Jun. 30, 2026 USD ($)	Jan. 31, 2026 USD ($) ft² parkingSpace	Jan. 31, 2026 EUR (€) ft² parkingSpace	Dec. 31, 2025 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease asset		$ 12,217			$ 5,011
Lisbon, Portugal
Lessee, Lease, Description [Line Items]
Area of real estate property \| ft²			16,189	16,189
Number of parking spaces \| parkingSpace			27	27
Operating lease, term (in years)			72 months	72 months
Lessee operating lease renewal term (in years)			3 years	3 years
Operating lease asset			$ 3,600
Operating lease liabilities			$ 3,500
Monthly rent expense \| €				€ 0.1
Palo Alto, California
Lessee, Lease, Description [Line Items]
Area of real estate property \| ft²	21,615
Lessee operating lease renewal term (in years)	3 years
Monthly rent expense	$ 100
Number of operating leases \| lease	2
Operating lease, number of suites \| suite	3
Number of separate leases \| lease	2
Lessee, operating lease, number of renewal options \| renewalOption	2
Palo Alto, California \| Building, Suite 125
Lessee, Lease, Description [Line Items]
Area of real estate property \| ft²	7,540
Operating lease asset	$ 3,700
Operating lease liabilities	$ 3,700
Palo Alto, California \| Building, Suite 302
Lessee, Lease, Description [Line Items]
Area of real estate property \| ft²	1,390
Operating lease asset	$ 700
Operating lease liabilities	$ 700