XML 18 R18.htm IDEA: XBRL DOCUMENT v3.20.1
Summary of Significant Accounting Policies (Details)
Mar. 31, 2020
Dec. 31, 2019
Graham Alternative Investment Ltd. [Abstract]    
Percentage of ownership interest 100.00%  
Graham Alternative Investment Trading LLC [Member]    
Schedule of Equity Method Investments [Abstract]    
Ownership percentage 48.81% 49.24%