SEGMENT REPORTING - Summary of Long-lived Assets by Geographical Region (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net long-lived assets	$ 51,170	$ 59,749
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net long-lived assets	28,399	36,258
Canada Direct Lending
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net long-lived assets	22,270	23,491
Canada POS Lending
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net long-lived assets	$ 501	$ 0