Commitments and Contingencies - Schedule of Future Minimum Lease Payments (Details) - Office and transmitter buildings $ in Thousands	Dec. 31, 2022 USD ($)
Lessee, Lease, Description [Line Items]
2023	$ 5,777
2024	3,843
2025	2,820
2026	2,252
2027	1,100
Thereafter	2,470
Total	$ 18,262

Lessee, Noncancelable Operating Lease, Liability, to be Paid

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Lessee, Noncancelable Operating Lease, Liability, to be Paid, after Year Five

+ References

No definition available.

+ Details

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Namespace Prefix:	spok_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Lessee, Noncancelable Operating Lease, Liability, to be Paid, Year Five

+ References

No definition available.

+ Details

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Namespace Prefix:	spok_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Lessee, Noncancelable Operating Lease, Liability, to be Paid, Year Four

+ References

No definition available.

+ Details

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Namespace Prefix:	spok_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Lessee, Noncancelable Operating Lease, Liability, to be Paid, Year One

+ References

No definition available.

+ Details

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Namespace Prefix:	spok_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Lessee, Noncancelable Operating Lease, Liability, to be Paid, Year Three

+ References

No definition available.

+ Details

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Namespace Prefix:	spok_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Lessee, Noncancelable Operating Lease, Liability, to be Paid, Year Two

+ References

No definition available.

+ Details

Name:	spok_LesseeNoncancelableOperatingLeaseLiabilityToBePaidYearTwo
Namespace Prefix:	spok_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
Period Type: