Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2024	Feb. 21, 2025	Jun. 30, 2024
Document Information [Line Items]
Entity Central Index Key	0001095565
Entity Registrant Name	HEALTHSTREAM INC
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2024
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Document Transition Report	false
Entity File Number	000-27701
Entity Incorporation, State or Country Code	TN
Entity Tax Identification Number	62-1443555
Entity Address, Address Line One	500 11th Avenue North, Suite 1000
Entity Address, Postal Zip Code	37203
Entity Address, City or Town	Nashville
Entity Address, State or Province	TN
City Area Code	615
Local Phone Number	301-3100
Title of 12(b) Security	Common Stock (Par Value $0.00)
Trading Symbol	HSTM
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 673,600,000
Entity Common Stock, Shares Outstanding		30,434,310
Auditor Firm ID	42
Auditor Name	Ernst & Young LLP
Auditor Location	Nashville, Tennessee