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Revenue, Deferred Revenue And Prepaid Commissions - Deferred Revenues (Details) $ in Thousands | 9 Months Ended
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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

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- Definition Contract With Customer, Asset And Liability [Roll Forward] + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- 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

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- Definition Contract​ With ​Customer, ​Liability, ​Revenue​ Recognized​, Including​ Opening​ Balance + References No definition available. + Details
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Balance Type: | credit
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- 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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