Cover - shares	3 Months Ended
	Mar. 31, 2025	Apr. 25, 2025
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2025
Document Transition Report	false
Entity File Number	001-32358
Entity Registrant Name	SPOK HOLDINGS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	16-1694797
Entity Address, Address Line One	3000 Technology Drive
Entity Address, Address Line Two	Suite 400
Entity Address, City or Town	Plano
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75074
City Area Code	800
Local Phone Number	611-8488
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	SPOK
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		20,572,296
Entity Central Index Key	0001289945
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q1
Amendment Flag	false