Annual report pursuant to Section 13 and 15(d)

NATURE OF BUSINESS AND ACCOUNTING POLICIES - Concentration of Risk (Details)

v3.21.1
NATURE OF BUSINESS AND ACCOUNTING POLICIES - Concentration of Risk (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenue from Contract with Customer | Merchant Portability Rights      
Product Information [Line Items]      
Concentration risk, percentage 21.00% 18.00% 14.00%