Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Mar. 13, 2019	Jun. 30, 2018
Document and Entity Information
Entity Registrant Name	ALLIED MOTION TECHNOLOGIES INC
Entity Central Index Key	0000046129
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 359,222,177
Entity Common Stock, Shares Outstanding		9,534,885
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY