COMMON SHARES (Details) - shares	Dec. 31, 2019	Jun. 14, 2019	Jun. 13, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Common stock, authorized (in shares)	500,000,000			200,000,000
B. Riley Financial, Inc. and Vintage | Amended Credit Agreement
Class of Stock [Line Items]
Common stock, authorized (in shares)		500,000,000	200,000,000