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Fees and Related Party Transactions (Tables)
12 Months Ended
Dec. 31, 2018
Fees and Related Party Transactions [Abstract]  
Advisory Fees
For the years ended December 31, 2018 and 2017, the Advisory Fees allocated to the Fund by each Class of GAIT totaled $523,762 and $823,044, respectively.

Period
 
Annual Rate
 
    
For the period from January 1, 2017 through June 30, 2017
  
1.75%

For the period from July 1, 2017 through December 31, 2018
  
1.50%

Sponsor Fees
For the years ended December 31, 2018 and 2017, the Sponsor Fees allocated to the Fund by each Class of GAIT totaled $272,976 and $482,788, respectively.

Period
 
Class 0
  
Class 2
 
       
For the period from January 1, 2017 through March 31, 2017
  
0.75%

  
2.75%

For the period from April 1, 2017 through June 30, 2017
  
0.75%

  
1.50%

For the period from July 1, 2017 through December 31, 2018
  
0.50%

  
1.25%