v3.25.2
Cover - shares
 6 Months Ended
Jun. 30, 2025
Jul. 25, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 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   20,590,924
Entity Central Index Key 0001289945  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Amendment Flag false