AQUISITIONS (Details 1) - 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 |
|
| Weighted average basic shares outstanding (in shares) | 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 |
| Weighted average diluted shares outstanding (in shares) | 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 |
| United Online Inc [Member] | |||||||||||
| Revenues | $ 226,806 | $ 202,752 | |||||||||
| Net income attributable to B. Riley Financial, Inc. | $ 13,288 | $ 9,347 | |||||||||
| Basic earnings per share (in dollars per share) | $ 0.73 | $ 0.58 | |||||||||
| Diluted earnings per share (in dollars per share) | $ 0.72 | $ 0.57 | |||||||||
| Weighted average basic shares outstanding (in shares) | 18,106,621 | 16,221,040 | |||||||||
| Weighted average diluted shares outstanding (in shares) | 18,391,852 | 16,265,915 | |||||||||