DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - SCHEDULE OF CONCENTRATION OF CREDIT RISK (Details) - Customer Concentration Risk - Revenue Benchmark |
3 Months Ended | |
---|---|---|
Mar. 31, 2022 |
Mar. 31, 2021 |
|
Citadel Securities, LLC | ||
Concentration Risk [Line Items] | ||
Concentration risk, percentage | 22.00% | 27.00% |
Entities affiliated with Susquehanna International Group, LLP | ||
Concentration Risk [Line Items] | ||
Concentration risk, percentage | 12.00% | 12.00% |
Entities affiliated with Wolverine Holdings, L.P. | ||
Concentration Risk [Line Items] | ||
Concentration risk, percentage | 10.00% | 9.00% |
All others individually less than 10% | ||
Concentration Risk [Line Items] | ||
Concentration risk, percentage | 28.00% | 33.00% |
Total as percentage of total revenue | ||
Concentration Risk [Line Items] | ||
Concentration risk, percentage | 72.00% | 81.00% |