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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details - Key Financial Data on Joint Ventures) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Balance Sheet Data: |  |  |
Current assets | $ 27,427 | $ 28,317 |
Noncurrent assets | 61,037 | 45,912 |
Current liabilities | (9,217) | (4,300) |
Noncurrent liabilities | (18,872) | (4,898) |
Total net assets | 60,375 | 65,031 |
Book value of RadNet joint venture interests | 28,001 | 30,030 |
Cost in excess of book value of acquired joint venture interests accounted for as equity method goodwill | 6,469 | 7,943 |
Total value of RadNet joint venture interests | 34,470 | 37,973 | $ 52,435
Total book value of other joint venture partner interests | 32,374 | 35,001 |
Net revenue | 108,051 | 155,820 | 188,849
Net Income From Joint Ventures | $ 18,624 | $ 24,596 | $ 28,644

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