Document and Entity Information - USD ($)	6 Months Ended
	Jun. 30, 2017	Oct. 31, 2016	Jun. 30, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	TRANSACT TECHNOLOGIES INC
Entity Central Index Key	0001017303
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Entity Public Float			$ 0
Entity Common Stock, Shares Outstanding		0
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q2
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017