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13. QUARTERLY RESULTS OF OPERATIONS (Details-Statements of Operations) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Quarterly Results Of Operations Details-statements Of Operations |  |  |  |  |  |  |  |  |  |  |
Net service fee revenue | $ 215,706 | $ 208,366 | $ 204,289 | $ 181,267 | $ 185,552 | $ 184,059 | $ 179,082 | $ 168,876 | $ 809,628 | $ 717,569 | $ 702,986
Total operating expenses | 205,256 | 191,137 | 190,905 | 183,213 | 170,676 | 168,824 | 163,436 | 161,328 | 770,511 | 664,264 | 659,383
Total other expenses | 10,109 | 5,731 | 10,836 | 6,723 | 9,951 | 10,401 | 10,803 | 25,468 | 56,623 | 43,911 |
Equity in earnings of joint ventures | (2,626) | (1,992) | (3,207) | (1,102) | (2,248) | (2,009) | (1,646) | (1,067) | (8,927) | (6,970) | (6,194)
Benefit from (provision for) income taxes | (1,707) | (5,199) | (2,192) | 3,091 | (2,878) | (2,334) | (1,233) | 4,478 | (6,007) | (1,967) | (3,510)
Net (loss) income | 1,260 | 8,291 | 3,563 | (4,476) | 4,295 | 4,509 | 5,256 | (12,375) | 8,638 | 1,685 | 2,376
Net income attributable to noncontrolling intersts | 379 | 304 | 168 | 78 | 90 | 58 | 112 | 49 | 929 | 309 | 256
Net (loss) income attributable to Radnet, Inc. common stockholders | $ 881 | $ 7,987 | $ 3,395 | $ (4,554) | $ 4,205 | $ 4,451 | $ 5,144 | $ (12,424) | $ 7,709 | $ 1,376 | $ 2,120
Basic net (loss) income attributable to Radnet, Inc. common stockholders (loss) earnings per share: | $ .02 | $ .18 | $ .08 | $ (.11) | $ 0.10 | $ 0.11 | $ 0.13 | $ (0.31) | $ 0.18 | $ 0.03 | $ .05
Diluted net (loss) income attributable to Radnet, Inc. common stockholders (loss) earnings per share: | $ .02 | $ .18 | $ .08 | $ (.11) | $ 0.10 | $ 0.10 | $ 0.13 | $ (0.31) | $ .17 | $ 0.03 | $ .05
Weighted average shares outstanding - Basic | 45,454,000 | 43,637,000 | 43,370,000 | 42,747,000 | 41,783,000 | 41,645,000 | 40,817,000 | 40,010,000 | 43,805,794 | 41,070,077 | 39,140,480
Weighted average shares outstanding - Diluted | 46,545,000 | 44,752,000 | 44,686,000 | 42,747,000 | 44,182,000 | 44,034,000 | 43,263,000 | 40,010,000 | 45,171,372 | 43,149,196 | 39,814,535

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