Subsequent Events - Narrative (Details) - USD ($)	Apr. 30, 2018	Mar. 31, 2018
Subsequent Event [Line Items]
Common stock par value (USD per share)		$ 0.0001
RPX Corporation \| Riptide Parent, LLC \| Subsequent Event
Subsequent Event [Line Items]
Acquisition price per share (USD per share)	$ 10.50
Fee for termination by company	$ 18,388,081
Fee for termination by parent	$ 31,522,425

Business Combination, Merger Terms, Fee for Termination by Company

No definition available.

Name:	rpxc_BusinessCombinationMergerTermsFeeforTerminationbyCompany
Namespace Prefix:	rpxc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Business Combination, Merger Terms, Fee for Termination by Parent

+ References

No definition available.

+ Details

Name:	rpxc_BusinessCombinationMergerTermsFeeforTerminationbyParent
Namespace Prefix:	rpxc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionSharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_BusinessAcquisitionAxis=rpxc_RPXCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=rpxc_RiptideParentLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: