XML 69 R58.htm IDEA: XBRL DOCUMENT v3.21.1
Fair Value Measurements (Details 2) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Senior Notes due 2022 $ 27,272,727 $ 27,313,994
Level 1 [Member]    
Senior Notes due 2022 0 0
Level 2 [Member]    
Senior Notes due 2022 27,272,727 27,313,994
Level 3 [Member]    
Senior Notes due 2022 $ 0 $ 0