SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Quarterly Financial Information Disclosure [Abstract] | |||||||||||
| Total revenues | $ 93,178 | $ 56,966 | $ 20,261 | $ 19,946 | $ 19,761 | $ 21,272 | $ 45,461 | $ 26,031 | |||
| Operating income (loss) | 31,458 | 15,422 | 180 | 1,665 | (1,326) | 3,277 | 14,669 | 5,462 | $ 48,725 | $ 22,082 | $ (7,431) |
| Income (loss) before income taxes | 31,146 | 14,457 | (92) | 1,536 | (1,418) | 3,218 | 14,254 | 5,211 | |||
| (Provision) benefit for income taxes | (8,137) | (6,083) | 65 | (166) | 372 | (600) | (5,684) | (1,775) | 14,321 | 7,688 | (2,886) |
| Net income (loss) attributable to B. Riley | 23,009 | 8,374 | (27) | 1,370 | (1,046) | 2,618 | 8,569 | 3,436 | 32,726 | 13,577 | (5,795) |
| Net income (loss) attributable to B. Riley Financial, Inc. | $ 12,440 | $ 8,939 | $ (101) | $ 248 | $ (1,004) | $ 1,463 | $ 8,664 | $ 2,682 | $ 21,526 | $ 11,805 | $ (5,801) |
| Earnings (loss) per share: | |||||||||||
| Basic | $ 0.65 | $ 0.47 | $ (0.01) | $ 0.02 | $ (0.06) | $ 0.09 | $ 0.53 | $ 0.17 | $ 1.19 | $ 0.73 | $ (0.60) |
| Diluted | $ 0.64 | $ 0.47 | $ (0.01) | $ 0.01 | $ (0.06) | $ 0.09 | $ 0.53 | $ 0.17 | $ 1.17 | $ 0.73 | $ (0.60) |
| Weighted average shares outstanding: | |||||||||||
| Basic | 19,004,548 | 18,977,072 | 17,935,254 | 16,490,178 | 16,283,677 | 16,243,425 | 16,237,860 | 16,117,422 | 18,106,621 | 16,221,040 | 9,612,154 |
| Diluted | 19,511,292 | 19,208,527 | 17,935,254 | 16,553,953 | 16,283,677 | 16,344,649 | 16,310,829 | 16,162,304 | 18,391,852 | 16,265,915 | 9,612,154 |