Quarterly report pursuant to Section 13 or 15(d)

Concentration of Credit Risk and Off-Balance Sheet Risk (Details)

v3.19.3.a.u2
Concentration of Credit Risk and Off-Balance Sheet Risk (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Gross Sales [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 4.00% 6.00% 4.00% 6.00%  
Accounts Receivable [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage     38.00%   54.00%