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SELECTED QUARTERLY FINANCIAL DATA (Unaudited) (Details) - Quarterly Financial Information - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015
Quarterly Financial Information [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ 1,471 | $ 1,669 | $ 1,642 | $ 1,981 | $ 1,636 | $ 1,330 | $ 1,289 | $ 1,250 | $ 6,763 | $ 5,505 | $ 7,333
Income (loss) from continuing operations before income taxes | (796) | (30) | 15 | 284 | (251) | (392) | (2,187) | (861) | (527) | (3,691) | (3,073)
Tax expense (benefit) | 4 | 3 | (10) | 20 | (1) | (16) | 0 | 11 | 17 | (6) | 822
Income (loss) from continuing operations | (800) | (33) | 25 | 264 | (250) | (376) | (2,187) | (872) | (544) | (3,685) | (3,895)
Income (loss) from discontinued operations |  |  |  |  | 0 | 0 | (25) | 7 | 0 | (18) | (81)
Net income (loss) | (800) | (33) | 25 | 264 | (250) | (376) | (2,212) | (865) | (544) | (3,703) | (3,976)
Net income (loss) attributable to non-controlling interest | (49) | 0 | 17 | 1 | (5) | (26) | 0 | 3 | (31) | (28) | 54
Net income (loss) attributable to U.S. Global Investors, Inc. | (751) | (33) | 8 | 263 | (245) | (350) | (2,212) | (868) | (513) | (3,675) | (4,030)
Comprehensive income (loss) | (459) | (215) | (370) | 941 | (348) | 148 | (1,592) | (1,577) | (103) | (3,369) | (5,505)
Comprehensive income (loss) attributable to U.S. Global Investors, Inc. | $ (471) | $ (219) | $ (356) | $ 946 | $ (348) | $ 115 | $ (1,575) | $ (1,533) | $ (100) | $ (3,341) | $ (5,419)
Earnings (loss) per share attributable to U.S. Global Investors, Inc.: |  |  |  |  |  |  |  |  |  |  |
Loss from continuing operations (in Dollars per share) |  |  |  |  | $ (0.02) | $ (0.02) | $ (0.14) | $ (0.06) | $ (0.03) | $ (0.24) | $ (0.25)
Loss from discontinued operations (in Dollars per share) |  |  |  |  | 0 | 0 | 0 | 0 | 0 | 0 | (0.01)
Net loss attributable to U.S. Global Investors, Inc. (in Dollars per share) | $ (0.05) | $ 0 | $ 0 | $ 0.02 | (0.02) | (0.02) | (0.14) | (0.06) | (0.03) | (0.24) | (0.26)
Loss from continuing operations (in Dollars per share) |  |  |  |  | (0.02) | (0.02) | (0.14) | (0.06) | (0.03) | (0.24) | (0.25)
Loss from discontinued operations (in Dollars per share) |  |  |  |  | 0 | 0 | 0 | 0 | 0 | 0 | (0.01)
Net loss attributable to U.S. Global Investors, Inc. (in Dollars per share) | $ (0.05) | $ 0 | $ 0 | $ 0.02 | $ (0.02) | $ (0.02) | $ (0.14) | $ (0.06) | $ (0.03) | $ (0.24) | $ (0.26)
Average Assets Under Management | $ 732,800 | $ 841,400 | $ 850,700 | $ 945,600 | $ 835,600 | $ 708,700 | $ 707,600 | $ 724,000 |  |  |

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