XML 61 R50.htm IDEA: XBRL DOCUMENT
v3.23.3

Stockholders' Equity - Activities Under Equity Plan (Details) - shares |  | 9 Months Ended
--- | --- | ---
Jul. 25, 2023 | Sep. 30, 2023
Share-based Compensation Arrangement By Share-based Payment Award, Shares Authorized [Roll Forward] |  |
Additional shares available for issuance under the 2020 Equity Plan (in shares) | 1,000,000 |
ESPP |  |
Share-based Compensation Arrangement By Share-based Payment Award, Shares Authorized [Roll Forward] |  |
Shares available for grant (in shares) |  | 133,184
ESPP common stock purchased by eligible employees (in shares) |  | (12,558)
Shares available for grant (in shares) |  | 120,626
Unvested RSUs, DSUs and Restricted Stock |  |
Share-based Compensation Arrangement By Share-based Payment Award, Shares Authorized [Roll Forward] |  |
RSU, DSU, and restricted stock awarded to eligible employees, net of forfeitures (in shares) |  | (462,512)
Unvested RSUs, DSUs and Restricted Stock | 2012 Equity Plan |  |
Share-based Compensation Arrangement By Share-based Payment Award, Shares Authorized [Roll Forward] |  |
Shares available for grant (in shares) |  | 683,052
Additional shares available for issuance under the 2020 Equity Plan (in shares) |  | 1,000,000
RSU, DSU, and restricted stock awarded to eligible employees, net of forfeitures (in shares) |  | (398,588)
Shares available for grant (in shares) |  | 1,284,464

X
- Definition Share-based Compensation Arrangement By Share-based Payment Award, Shares Authorized [Roll Forward] + References No definition available. + Details
Name: | spok_SharebasedCompensationArrangementBySharebasedPaymentAwardSharesAuthorizedRollForward
Namespace Prefix: | spok_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of additional shares authorized for issuance under share-based payment arrangement. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PlanNameAxis=spok_EmployeeStockPurchasePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=spok_RestrictedStockRestrictedStockUnitsAndDeferredStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=spok_A2012EquityPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |