LOSS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net loss attributable to Altisource	$ (22,002)	$ (11,650)
Weighted average common shares outstanding, basic (in shares)	15,717	15,497
Weighted average common shares outstanding, diluted (in shares)	15,717	15,497
Loss per share:
Basic (in usd per share)	$ (1.40)	$ (0.75)
Diluted (in usd per share)	$ (1.40)	$ (0.75)
Anti-dilutive securities
Options, restricted shares and restricted share units excluded from the computation of diluted EPS (in shares)	1,700	1,900
Employee and Nonemployee Stock Options, Restricted Stock and Restricted Stock Units Whose Impacts are Anti-Dilutive
Anti-dilutive securities
Options, restricted shares and restricted share units excluded from the computation of diluted EPS (in shares)	300	300
Options Whose Exercise Price is Greater than Average Market Price
Anti-dilutive securities
Options, restricted shares and restricted share units excluded from the computation of diluted EPS (in shares)	300	900
Options and Restricted Shares Issuable upon Achievement of Certain Market and Performance Criteria That Has Not Been Met
Anti-dilutive securities
Options, restricted shares and restricted share units excluded from the computation of diluted EPS (in shares)	1,200	800