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SHAREHOLDERS' EQUITY AND SHARE-BASED COMPENSATION - Narrative (Details) $ / shares in Units, $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 15, 2018 $ / shares shares | Apr. 30, 2018 | Dec. 31, 2021 USD ($) vote component $ / shares shares | Dec. 31, 2020 USD ($) shares
Common Stock [Abstract] |  |  |  |
Common stock, shares authorized (in shares) |  |  | 100,000,000 | 100,000,000
Common stock, shares issued (in shares) |  |  | 25,413,000 | 25,413,000
Common stock, shares outstanding (in shares) |  |  | 15,911,000 | 15,664,000
Voting rights per share | vote |  |  | 1,000 |
Equity Incentive Plan [Abstract] |  |  |  |
Maximum number of Altisource share-based awards that can be granted under the Plan (in shares) |  |  | 6,700,000 |
Share-based awards available for future grants under the Plan (in shares) |  |  | 1,200,000 |
Share Repurchase Program [Abstract] |  |  |  |
Authorized amount (approximately) | $ |  |  | $ 80.0 |
Capacity available to repurchase common stock under senior secured term loan | $ |  |  | 437.0 |
Share-Based Compensation [Abstract] |  |  |  |
Share-based compensation expense | $ |  |  | 2.8 | $ 7.8
Estimated unrecognized compensation costs | $ |  |  | $ 2.4 |
Weighted average remaining requisite service period for stock options over which unrecognized compensation costs would be recognized |  |  | 1 year 3 months 14 days |
Options outstanding (in shares) |  |  | 687,339 | 899,914
Term B Loans |  |  |  |
Share Repurchase Program [Abstract] |  |  |  |
Covenant threshold, leverage ratio |  | 3.50 | 3.50 |
Stock Repurchase Program, Current |  |  |  |
Share Repurchase Program [Abstract] |  |  |  |
Number of shares of common stock authorized to be purchased (in shares) | 4,300,000 |  |  |
Percentage of outstanding shares authorized to be repurchased | 25.00% |  |  |
Minimum purchase price authorized (in dollars per share) | $ / shares | $ 1.00 |  |  |
Maximum purchase price authorized (in dollars per share) | $ / shares | $ 500.00 |  |  |
Stock repurchase program, period in force | 5 years |  |  |
Remaining number of shares available for repurchase under the plan (in shares) |  |  | 2,400,000 |
Stock Repurchase Programs |  |  |  |
Share Repurchase Program [Abstract] |  |  |  |
Number of shares of common stock purchased (in shares) |  |  | 0 |
Stock Options |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Stock options granted, approximate (in shares) |  |  | 0 | 0
Stock Options, Service-Based |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Options outstanding (in shares) |  |  | 181,000 |
Stock Options, Service-Based | Minimum |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Vesting period |  |  | 3 years |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Vesting period |  |  | 3 years |
Stock Options, Service-Based | Maximum |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Vesting period |  |  | 4 years |
Expiration term |  |  | 10 years |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Vesting period |  |  | 4 years |
Stock Options, Market-Based |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Options outstanding (in shares) |  |  | 140,000 |
Number of components of an award | component |  |  | 2 |
Allowable performance period before expiration date |  |  | 3 years |
Stock Options, Market-Based | Minimum |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Vesting period |  |  | 3 years |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Vesting period |  |  | 3 years |
Stock Options, Market-Based | Maximum |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Vesting period |  |  | 4 years |
Expiration term |  |  | 10 years |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Vesting period |  |  | 4 years |
Ordinary performance |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Percentage of awards |  |  | 67.00% |
Vesting threshold |  |  | 2 |
Ordinary performance | Minimum |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Percentage of compounded annual gain of stock price over exercise price required for the award to vest |  |  | 20.00% |
Extraordinary performance |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Percentage of awards |  |  | 33.00% |
Extraordinary performance | Minimum |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Percentage of compounded annual gain of stock price over exercise price required for the award to vest |  |  | 25.00% |
Stock Options, Performance-Based |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Options outstanding (in shares) |  |  | 366,000 |
Stock Options, Performance-Based | Share-based Payment Arrangement, Tranche One |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Award vesting rights, percentage |  |  | 25.00% |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Award vesting rights, percentage |  |  | 25.00% |
Stock Options, Performance-Based | Share-based Payment Arrangement, Tranche Two |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Award vesting rights, percentage |  |  | 25.00% |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Award vesting rights, percentage |  |  | 25.00% |
Stock Options, Performance-Based | Share-based Payment Arrangement, Tranche Three |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Award vesting rights, percentage |  |  | 25.00% |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Award vesting rights, percentage |  |  | 25.00% |
Stock Options, Performance-Based | Share-based Payment Arrangement, Tranche Four |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Award vesting rights, percentage |  |  | 25.00% |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Award vesting rights, percentage |  |  | 25.00% |
Stock Options, Performance-Based | Minimum |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Allowable performance period before expiration date |  |  | 10 years |
Attainment above threshold performance levels, vesting percentage |  |  | 50.00% |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Attainment above threshold performance levels, vesting percentage |  |  | 50.00% |
Stock Options, Performance-Based | Maximum |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Attainment above threshold performance levels, vesting percentage |  |  | 200.00% |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Attainment above threshold performance levels, vesting percentage |  |  | 200.00% |
Restricted Shares and Restricted Stock Units (RSUs), Service-Based |  |  |  |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Other than options, outstanding (in shares) |  |  | 249,000 |
Restricted Shares and Restricted Stock Units (RSUs), Service-Based | Minimum |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Vesting period |  |  | 2 years |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Vesting period |  |  | 2 years |
Restricted Shares and Restricted Stock Units (RSUs), Service-Based | Maximum |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Vesting period |  |  | 4 years |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Vesting period |  |  | 4 years |
Restricted Shares and Restricted Stock Units (RSUs), Performance-Based |  |  |  |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Other than options, outstanding (in shares) |  |  | 187,000 |
Restricted Shares and Restricted Stock Units (RSUs), Performance-Based | Share-based Payment Arrangement, Tranche One |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Award vesting rights, percentage |  |  | 33.00% |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Award vesting rights, percentage |  |  | 33.00% |
Restricted Shares and Restricted Stock Units (RSUs), Performance-Based | Share-based Payment Arrangement, Tranche Two |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Award vesting rights, percentage |  |  | 33.00% |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Award vesting rights, percentage |  |  | 33.00% |
Restricted Shares and Restricted Stock Units (RSUs), Performance-Based | Share-based Payment Arrangement, Tranche Three |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Award vesting rights, percentage |  |  | 33.00% |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Award vesting rights, percentage |  |  | 33.00% |
Restricted Shares and Restricted Stock Units (RSUs), Performance-Based | Maximum |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Attainment above threshold performance levels, vesting percentage |  |  | 150.00% |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Attainment above threshold performance levels, vesting percentage |  |  | 150.00% |
Restricted Shares and Restricted Stock Units (RSUs), Market-Based |  |  |  |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Other than options, outstanding (in shares) |  |  | 112,000 |
Restricted Shares and Restricted Stock Units (RSUs), Market-Based | Minimum |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Vesting period |  |  | 30 days |
Award vesting rights, percentage |  |  | 50.00% |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Vesting period |  |  | 30 days |
Award vesting rights, percentage |  |  | 50.00% |
Restricted Shares and Restricted Stock Units (RSUs), Market-Based | Maximum |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Vesting period |  |  | 1 year |
Award vesting rights, percentage |  |  | 50.00% |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Vesting period |  |  | 1 year |
Award vesting rights, percentage |  |  | 50.00% |
Restricted Shares and Restricted Stock Units (RSUs), Performance-Based and Market-Based |  |  |  |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Other than options, outstanding (in shares) |  |  | 77,000 |
Restricted Shares and Restricted Stock Units (RSUs), Performance-Based and Market-Based | Maximum |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Attainment above threshold performance levels, vesting percentage |  |  | 300.00% |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Attainment above threshold performance levels, vesting percentage |  |  | 300.00% |
Restricted Share Units |  |  |  |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Other than options, granted (in shares) |  |  | 368,000 |
Other than options, granted (in dollars per share) | $ / shares |  |  | $ 9.57 |
Restricted Stock Units (RSUs), Performance-Based |  |  |  |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Other than options, granted (in shares) |  |  | 29,000 |
Restricted Stock Units (RSUs), Market-Based |  |  |  |
Schedule of Share-based compensation, Restricted Stock and Restricted Stock units activity |  |  |  |
Other than options, granted (in shares) |  |  | 89,000 |

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