XML 61 R64.htm IDEA: XBRL DOCUMENT v3.19.3
Public Housing Capital Fund Trust ("PHC") Certificates - Additional Information (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2018
USD ($)
Security
Sep. 30, 2018
USD ($)
Security
Sep. 30, 2019
Option
Schedule Of Available For Sale Securities [Line Items]      
Impairment of securities $ 309,958 $ 1,141,020  
Public housing capital fund trusts [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Number of tender option bonds | Option     3
Impairment charge recognized for number of securities | Security 3 3  
Impairment of securities $ 310,000 $ 1,100,000