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Revenue, Deferred Revenue And Prepaid Commissions - Deferred Revenues (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Contract With Customer, Asset And Liability [Roll Forward]
Beginning balance	$ 27,505
Additions	44,910
Revenue Recognized	(46,910)
Ending balance	$ 25,505

X

- Definition

Contract With Customer, Asset And Liability [Roll Forward]

+ References

No definition available.

+ Details

Name:	spok_ContractWithCustomerAssetAndLiabilityRollForward
Namespace Prefix:	spok_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Contract With Customer, Liability, Increase From Additions

+ References

No definition available.

+ Details

Name:	spok_ContractWithCustomerLiabilityIncreaseFromAdditions
Namespace Prefix:	spok_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Contract​ With ​Customer, ​Liability, ​Revenue​ Recognized​, Including​ Opening​ Balance

+ References

No definition available.

+ Details

Name:	spok_ContractWithCustomerLiabilityRevenueRecognizedIncludingOpeningBalance
Namespace Prefix:	spok_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479837/606-10-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-8

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479837/606-10-45-2

+ Details

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