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Revenue, Deferred Revenue and Prepaid Commissions - Deferred Revenue (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Contract With Customer Liability (Roll Forward) [Abstract]
Beginning balance	$ 26,406
Additions	58,536
Revenue Recognized	(58,418)
Ending balance	$ 26,524

X

- Definition

Contract With Customer Liability Increase From Additions

+ References

No definition available.

+ Details

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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

Contract With Customer Liability (Roll Forward)

+ References

No definition available.

+ Details

Name:	spok_ContractWithCustomerLiabilityRollForwardAbstract
Namespace Prefix:	spok_
Data Type:	xbrli:stringItemType
Balance Type:	na
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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130549-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130532-203044

+ Details

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