Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Mar. 28, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2021
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Current Fiscal Year End Date	--12-31
Entity File Number	001-36689
Entity Registrant Name	INSPIRED ENTERTAINMENT, INC.
Entity Central Index Key	0001615063
Entity Tax Identification Number	47-1025534
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	250 West 57th Street
Entity Address, Address Line Two	Suite 415
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10107
City Area Code	(646)
Local Phone Number	565-3861
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	INSE
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 214.5
Entity Common Stock, Shares Outstanding		26,880,622
Documents Incorporated By Reference	Portions of the registrant’s proxy statement relating to the 2022 annual meeting of stockholders are incorporated by reference in Part III. The proxy statement will be filed with the Securities and Exchange Commission no later than 120 days after the conclusion of the registrant’s fiscal year ended December 31, 2021. If such proxy statement is not filed on or before such date, the information called for by Part III will be filed as part of an amendment to this Annual Report on Form 10-K on or before such date
ICFR Auditor Attestation Flag	true
Auditor Firm ID	688
Auditor Name	Marcum LLP
Auditor Location	New York, NY