XML 67 R56.htm IDEA: XBRL DOCUMENT v3.20.2
Fair Value Measurements - Rollforward (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning Balance $ 478,312 $ 489,489 $ 483,804 $ 498,086
Total income recognized in earnings (2,751) (2,866) (8,243) (11,463)
Ending Balance $ 475,561 $ 486,623 $ 475,561 $ 486,623