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BASIS OF PRESENTATION, LIQUIDITY - Additional Information (Details) - USD ($)
 12 Months Ended
Jun. 28, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Net income (loss) attributable to UTStarcom Holdings Corp.   $ (5,002,000) $ (5,828,000) $ (23,676,000)
Accumulated deficit   1,251,209,000 1,246,207,000  
Net cash inflow (used) from operations   7,277,000 19,829,000 $ (3,400,000)
Cash and cash equivalents   $ 54,517,000 $ 53,797,000  
Reverse split stock one-for-four one-for-four one-for-four one-for-four
Subsidiaries | China        
Cash and cash equivalents   $ 13,500,000 $ 12,200,000  
Accumulated profit determined in accordance with accounting standards of a particular country that can be paid as dividends   $ 0