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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2017 USD ($) | Dec. 31, 2017 USD ($) label | Dec. 31, 2016 USD ($) | Mar. 31, 2017 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Wholly-owned labels | label |  | 2 |  |
Impairment of in-process research and development |  | $ 11,257 | $ 0 |
Grand Theft Auto |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Estimated service period |  | 50 months |  | 41 months
Accounting Standards Update 2016-09 |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Deferred tax assets, net |  |  |  | $ 24,594
Retained Earnings | Accounting Standards Update 2016-09, Forfeiture Rate Component |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Cumulative effect of new accounting principle |  |  |  | (323)
Additional Paid-in Capital | Accounting Standards Update 2016-09, Forfeiture Rate Component |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Cumulative effect of new accounting principle |  |  |  | $ 323
Social Point |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Impairment of in-process research and development | $ 11,257 |  |  |

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