Prepaid Expenses and Other - Prepaid Expenses and Other (Detail) (USD $)	3 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Other receivables	$ 2,000us-gaap_OtherReceivables	$ 751,000us-gaap_OtherReceivables
Tax receivables	104,000us-gaap_IncomeTaxesReceivable	155,000us-gaap_IncomeTaxesReceivable
Deposits	641,000us-gaap_DepositsAssetsCurrent	420,000us-gaap_DepositsAssetsCurrent
Prepaid insurance	285,000us-gaap_PrepaidInsurance	517,000us-gaap_PrepaidInsurance
Prepaid rent	119,000us-gaap_PrepaidRent	234,000us-gaap_PrepaidRent
Prepaid repairs and maintenance	842,000spok_PrepaidRepairsAndMaintenance	917,000spok_PrepaidRepairsAndMaintenance
Prepaid taxes	503,000us-gaap_PrepaidTaxes	279,000us-gaap_PrepaidTaxes
Prepaid commissions	2,557,000spok_PrepaidCommissions	2,935,000spok_PrepaidCommissions
Prepaid expenses	802,000us-gaap_OtherPrepaidExpenseCurrent	1,042,000us-gaap_OtherPrepaidExpenseCurrent
Total prepaid expenses and other	5,855,000	7,250,000
Increase (decrease) in deposits	200,000
Increase (decrease) in other receivables	(800,000)
Increase (decrease) in prepaid insurance	(200,000)
Increase (decrease) in prepaid rent	(100,000)us-gaap_IncreaseDecreaseInPrepaidRent
Increase (decrease) in prepaid repairs and maintenance	$ (100,000)

Increase (Decrease) in prepaid repairs and maintenance

No definition available.

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- Definition

Carrying amount as of the balance sheet date of payments made in advance for commissions earned for providing services, which will be charged against earnings within one year or the normal operating cycle, if longer.

+ References

No definition available.

+ Details

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- Definition

Carrying amount as of the balance sheet date of payments made in advance for repairs and maintenance, which will be charged against earnings within one year or the normal operating cycle, if longer.

+ References

No definition available.

+ Details

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- Definition

Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment within one year or during the operating cycle, if shorter.

+ 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 210.5-02.17)

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- Definition

Carrying amount due within one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10)

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-Topic 210

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.3(a)(4))

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.5(c))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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Balance Type:	debit
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- Definition

The increase (decrease) during the reporting period in moneys or securities given as security including, but not limited to, contract, escrow, or earnest money deposits, retainage (if applicable), deposits with clearing organizations and others, collateral, or margin deposits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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- Definition

The increase (decrease) during the reporting period in other amounts due to the reporting entity, which are not otherwise defined in the taxonomy.

+ References

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Amount of increase (decrease) of consideration paid in advance for insurance that provides economic benefits in future periods.

+ References

+ Details

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

- Definition

Amount of increase (decrease) of consideration paid in advance for rent that provides economic benefits in future periods.

+ References

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Amount of asset related to consideration paid in advance for other costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 1

-Subparagraph (g)

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-SubTopic 10

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-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6787-107765

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Period Type:	instant

- Definition

Carrying amounts due as of the balance sheet date from parties or arising from transactions not otherwise specified in the taxonomy.

+ 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 210.5-02.8)

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- Definition

Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 1

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 8

-Article 5

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- Definition

Amount of asset related to consideration paid in advance for insurance that provides economic benefits within a future period of one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Current Assets

-URI http://asc.fasb.org/extlink&oid=6509628

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- Definition

Amount of asset related to consideration paid in advance for rent that provides economic benefits within a future period of one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Glossary Current Assets

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-Paragraph 1

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-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765

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- Definition

Amount of asset related to consideration paid in advance for income and other taxes that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Current Assets

-URI http://asc.fasb.org/extlink&oid=6509628

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-Paragraph 1

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-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765

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