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Revenue, Deferred Revenue and Prepaid Commissions - Deferred Revenue (Details) $ in Thousands | 12 Months Ended
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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

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- Definition Contract With Customer Liability Increase From Additions + References No definition available. + Details
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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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- Definition Contract With Customer Liability (Roll Forward) + References No definition available. + Details
Name: | spok_ContractWithCustomerLiabilityRollForwardAbstract
Namespace Prefix: | spok_
Data Type: | xbrli:stringItemType
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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 -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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