Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 02, 2019
Document And Entity Information [Abstract]
Entity Registrant Name	MMA Capital Holdings, Inc.
Entity Central Index Key	0001003201
Entity Filer Category	Accelerated Filer
Current Fiscal Year End Date	--12-31
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Period Focus	Q1
Entity Current Reporting Status	Yes
Document Fiscal Year Focus	2019
Entity Common Stock, Shares Outstanding		5,884,300