Accrued Liabilities - Components of Other Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Payables and Accruals [Abstract]
Asset retirement obligations	$ 342	$ 358
Accrued outside services	1,101spok_AccruedOutsideServicesCurrent	1,049spok_AccruedOutsideServicesCurrent
Accrued accounting and legal	275us-gaap_AccruedProfessionalFeesCurrent	212us-gaap_AccruedProfessionalFeesCurrent
Accrued recognition awards	345spok_AccruedRecognitionAwards	327spok_AccruedRecognitionAwards
Accrued other	696spok_AccruedOtherCurrent	840spok_AccruedOtherCurrent
Capital Lease Obligations, Current	17us-gaap_CapitalLeaseObligationsCurrent	16us-gaap_CapitalLeaseObligationsCurrent
Deferred rent	77us-gaap_AccruedRentCurrent	77us-gaap_AccruedRentCurrent
Lease incentive	147us-gaap_LeaseIncentivePayableCurrent	152us-gaap_LeaseIncentivePayableCurrent
Dividends payable for 2011 LTIP	637us-gaap_DividendsPayableCurrent	0us-gaap_DividendsPayableCurrent
Total accrued other	$ 3,637	$ 3,031

Accrued Other Current

No definition available.

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for costs to outside vendors for services. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

No definition available.

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for awards to recognize employee services. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

No definition available.

+ Details

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- Definition

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

+ References

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Current Liabilities

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-Name Accounting Standards Codification

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-Section 45

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

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-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6911-107765

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for contractual rent under lease arrangements. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

+ Details

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- Definition

Current portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

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- Definition

Amount of capital lease obligation due within one year or the normal operating cycle, if longer.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

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-Paragraph 1

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-Topic 840

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45023-112735

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- Definition

Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

+ Details

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- Definition

This item represents an incentive or inducement contractually stipulated between parties to a lease whereby the lessor has committed to provide the entity (lessee) with a cash payment as inducement to enter the lease. Used to reflect the current portion of the liabilities (due within one year or within 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 S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

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-URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e40010-112707

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

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-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e40019-112707

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Lease Incentive

-URI http://asc.fasb.org/extlink&oid=6516590

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-Publisher FASB

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-Topic 840

-SubTopic 20

-Section 55

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6584307&loc=d3e41614-112719

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