CONDENSED SCHEDULE OF INVESTMENTS - USD ($)		Dec. 31, 2018		Dec. 31, 2017
Investment Owned
Short term investments		$ 2,208		$ 7,756
Net unrealized gain (loss) on open futures contracts		3,422,063		4,337,243
Net unrealized gain (loss) on open forward currency contracts		4,676,402		1,551,513
Fixed Income Securities [Member]
Investment Owned
Fair value		$ 156,131,114	[1]	$ 246,302,623	[2]
% of Net Asset Value		83.38%		90.92%
Fixed Income Securities [Member] | Asset Backed Securities [Member]
Investment Owned
Fair value		$ 11,501,171		$ 18,581,680
% of Net Asset Value		6.14%		6.86%
Fixed Income Securities [Member] | Asset Backed Securities [Member] | United States [Member] | Auto Loans [Member]
Investment Owned
Fair value		$ 7,569,517		$ 12,261,344
% of Net Asset Value		4.04%		4.52%
Fixed Income Securities [Member] | Asset Backed Securities [Member] | United States [Member] | Credit Cards [Member]
Investment Owned
Fair value		$ 3,931,654		$ 6,169,797
% of Net Asset Value		2.10%		2.28%
Fixed Income Securities [Member] | Asset Backed Securities [Member] | United States [Member] | Equipment Loans [Member]
Investment Owned
Fair value				$ 150,539
% of Net Asset Value				0.06%
Fixed Income Securities [Member] | Bank Deposits [Member]
Investment Owned
Fair value		$ 2,249,220		$ 4,831,364
% of Net Asset Value		1.20%		1.78%
Fixed Income Securities [Member] | Bank Deposits [Member] | Canada [Member] | Financials [Member]
Investment Owned
Fair value				$ 1,259,553
% of Net Asset Value				0.46%
Fixed Income Securities [Member] | Bank Deposits [Member] | United States [Member] | Financials [Member]
Investment Owned
Fair value		$ 2,249,220		$ 3,571,811
% of Net Asset Value		1.20%		1.32%
Fixed Income Securities [Member] | Commercial Paper [Member]
Investment Owned
Fair value		$ 49,825,892		$ 89,175,947
% of Net Asset Value		26.61%		32.92%
Fixed Income Securities [Member] | Commercial Paper [Member] | Japan [Member] | Financials [Member]
Investment Owned
Fair value				$ 3,872,670
% of Net Asset Value				1.43%
Fixed Income Securities [Member] | Commercial Paper [Member] | Switzerland [Member] | Financials [Member]
Investment Owned
Fair value		$ 1,589,640		$ 1,441,739
% of Net Asset Value		0.85%		0.53%
Fixed Income Securities [Member] | Commercial Paper [Member] | United States [Member]
Investment Owned
Fair value		$ 48,236,252		$ 83,861,538
% of Net Asset Value		25.76%		30.96%
Fixed Income Securities [Member] | Commercial Paper [Member] | United States [Member] | Communications [Member]
Investment Owned
Fair value		$ 1,504,169		$ 3,462,175
% of Net Asset Value		0.80%		1.28%
Fixed Income Securities [Member] | Commercial Paper [Member] | United States [Member] | Consumer Discretionary [Member]
Investment Owned
Fair value		$ 5,190,962		$ 9,188,026
% of Net Asset Value		2.77%		3.39%
Fixed Income Securities [Member] | Commercial Paper [Member] | United States [Member] | Consumer Staples [Member]
Investment Owned
Fair value		$ 8,848,532		$ 7,466,892
% of Net Asset Value		4.73%		2.76%
Fixed Income Securities [Member] | Commercial Paper [Member] | United States [Member] | Energy [Member]
Investment Owned
Fair value				$ 5,473,542
% of Net Asset Value				2.02%
Fixed Income Securities [Member] | Commercial Paper [Member] | United States [Member] | Financials [Member]
Investment Owned
Fair value		$ 10,413,321		$ 19,389,778
% of Net Asset Value		5.56%		7.16%
Fixed Income Securities [Member] | Commercial Paper [Member] | United States [Member] | Industrials [Member]
Investment Owned
Fair value		$ 3,848,945		$ 14,765,234
% of Net Asset Value		2.06%		5.45%
Fixed Income Securities [Member] | Commercial Paper [Member] | United States [Member] | Utilities [Member]
Investment Owned
Fair value		$ 18,430,323		$ 24,115,891
% of Net Asset Value		9.84%		8.90%
Fixed Income Securities [Member] | Corporate Bonds [Member]
Investment Owned
Fair value		$ 61,891,759		$ 79,693,629
% of Net Asset Value		33.05%		29.42%
Fixed Income Securities [Member] | Corporate Bonds [Member] | Australia [Member] | Financials [Member]
Investment Owned
Fair value		$ 365,276
% of Net Asset Value		0.19%
Fixed Income Securities [Member] | Corporate Bonds [Member] | Canada [Member] | Financials [Member]
Investment Owned
Fair value		$ 6,261,609		$ 1,175,657
% of Net Asset Value		3.34%		0.43%
Fixed Income Securities [Member] | Corporate Bonds [Member] | Japan [Member] | Financials [Member]
Investment Owned
Fair value		$ 2,033,119
% of Net Asset Value		1.09%
Fixed Income Securities [Member] | Corporate Bonds [Member] | United Kingdom [Member]
Investment Owned
Fair value		$ 4,019,228		$ 3,502,970
% of Net Asset Value		2.15%		1.29%
Fixed Income Securities [Member] | Corporate Bonds [Member] | United Kingdom [Member] | Energy [Member]
Investment Owned
Fair value		$ 1,199,357		$ 2,254,371
% of Net Asset Value		0.64%		0.83%
Fixed Income Securities [Member] | Corporate Bonds [Member] | United Kingdom [Member] | Financials [Member]
Investment Owned
Fair value		$ 2,819,871		$ 1,248,599
% of Net Asset Value		1.51%		0.46%
Fixed Income Securities [Member] | Corporate Bonds [Member] | United States [Member]
Investment Owned
Fair value		$ 49,212,527		$ 75,015,002
% of Net Asset Value		26.28%		27.70%
Fixed Income Securities [Member] | Corporate Bonds [Member] | United States [Member] | Communications [Member]
Investment Owned
Fair value		$ 7,496,773		$ 16,668,168
% of Net Asset Value		4.00%		6.15%
Fixed Income Securities [Member] | Corporate Bonds [Member] | United States [Member] | Consumer Discretionary [Member]
Investment Owned
Fair value		$ 5,583,595		$ 12,486,862
% of Net Asset Value		2.98%		4.61%
Fixed Income Securities [Member] | Corporate Bonds [Member] | United States [Member] | Consumer Staples [Member]
Investment Owned
Fair value		$ 4,737,658		$ 3,447,171
% of Net Asset Value		2.53%		1.27%
Fixed Income Securities [Member] | Corporate Bonds [Member] | United States [Member] | Energy [Member]
Investment Owned
Fair value		$ 1,317,702		$ 1,324,944
% of Net Asset Value		0.70%		0.49%
Fixed Income Securities [Member] | Corporate Bonds [Member] | United States [Member] | Financials [Member]
Investment Owned
Fair value		$ 23,589,978		$ 33,614,909
% of Net Asset Value		12.60%		12.42%
Fixed Income Securities [Member] | Corporate Bonds [Member] | United States [Member] | Industrials [Member]
Investment Owned
Fair value		$ 1,687,442		$ 4,171,249
% of Net Asset Value		0.90%		1.54%
Fixed Income Securities [Member] | Corporate Bonds [Member] | United States [Member] | Materials [Member]
Investment Owned
Fair value		$ 323,148
% of Net Asset Value		0.17%
Fixed Income Securities [Member] | Corporate Bonds [Member] | United States [Member] | Technology [Member]
Investment Owned
Fair value		$ 4,000,181		$ 2,573,693
% of Net Asset Value		2.14%		0.95%
Fixed Income Securities [Member] | Corporate Bonds [Member] | United States [Member] | Utilities [Member]
Investment Owned
Fair value		$ 476,050		$ 728,006
% of Net Asset Value		0.26%		0.27%
Fixed Income Securities [Member] | Government and Agency Obligations [Member]
Investment Owned
Fair value		$ 30,663,072		$ 54,020,003
% of Net Asset Value		16.38%		19.94%
Fixed Income Securities [Member] | Government and Agency Obligations [Member] | United States [Member] | U.S. Treasury Bills [Member] | U.S. Treasury Bills Due 01/17/2019 [Member]
Investment Owned
Fair value	[3]	$ 5,554,640
% of Net Asset Value		2.97%
Fixed Income Securities [Member] | Government and Agency Obligations [Member] | United States [Member] | U.S. Treasury Bills [Member] | U.S. Treasury Bills Due 02/21/2019 [Member]
Investment Owned
Fair value	[3]	$ 14,571,303
% of Net Asset Value		7.78%
Fixed Income Securities [Member] | Government and Agency Obligations [Member] | United States [Member] | U.S. Treasury Bills [Member] | U.S. Treasury Bills Due 03/28/2019 [Member]
Investment Owned
Fair value	[3]	$ 10,537,129
% of Net Asset Value		5.63%
Fixed Income Securities [Member] | Government and Agency Obligations [Member] | United States [Member] | U.S. Treasury Bills [Member] | U.S. Treasury Bills Due 02/22/2018 [Member]
Investment Owned
Fair value	[3]			$ 20,156,456
% of Net Asset Value				7.44%
Fixed Income Securities [Member] | Government and Agency Obligations [Member] | United States [Member] | U.S. Treasury Bills [Member] | U.S. Treasury Bills Due 03/29/2018 [Member]
Investment Owned
Fair value	[3]			$ 26,097,201
% of Net Asset Value				9.63%
Fixed Income Securities [Member] | Government and Agency Obligations [Member] | United States [Member] | U.S. Treasury Bills [Member] | U.S. Treasury Bills Due 04/26/2018 [Member]
Investment Owned
Fair value	[3]			$ 7,766,346
% of Net Asset Value				2.87%
Short Term Investments [Member]
Investment Owned
Short term investments		$ 2,208		$ 7,756
% of Net Asset Value		0.00%		0.00%
Short Term Investments [Member] | Money Market Funds [Member] | United States [Member]
Investment Owned
Short term investments		$ 2,208		$ 7,756
% of Net Asset Value		0.00%		0.00%
Futures Contracts [Member]
Investment Owned
Net unrealized gain (loss) on open futures contracts		$ 3,422,063		$ 4,337,243
% of Net Asset Value		1.83%		1.60%
Futures Contracts [Member] | Long [Member]
Investment Owned
Net unrealized gain (loss) on open futures contracts		$ (244,700)		$ 5,173,752
% of Net Asset Value		(0.13%)		1.91%
Futures Contracts [Member] | Long [Member] | Agriculture [Member]
Investment Owned
Net unrealized gain (loss) on open futures contracts		$ 124,980		$ 458,120
% of Net Asset Value		0.07%		0.17%
Futures Contracts [Member] | Long [Member] | Energy [Member]
Investment Owned
Net unrealized gain (loss) on open futures contracts		$ (883,950)		$ 2,106,079
% of Net Asset Value		(0.47%)		0.77%
Futures Contracts [Member] | Long [Member] | Metals [Member]
Investment Owned
Net unrealized gain (loss) on open futures contracts		$ (1,694,502)		$ 3,278,710
% of Net Asset Value		(0.91%)		1.21%
Futures Contracts [Member] | Long [Member] | Stock Indices [Member]
Investment Owned
Net unrealized gain (loss) on open futures contracts		$ (112,136)		$ 1,995,154
% of Net Asset Value		(0.06%)		0.74%
Futures Contracts [Member] | Long [Member] | Short-Term Interest Rates [Member]
Investment Owned
Net unrealized gain (loss) on open futures contracts		$ 1,084,485		$ (120,526)
% of Net Asset Value		0.58%		(0.04%)
Futures Contracts [Member] | Long [Member] | Long-Term Interest Rates [Member]
Investment Owned
Net unrealized gain (loss) on open futures contracts		$ 1,236,423		$ (2,543,785)
% of Net Asset Value		0.66%		(0.94%)
Futures Contracts [Member] | Short [Member]
Investment Owned
Net unrealized gain (loss) on open futures contracts		$ 3,666,763		$ (836,509)
% of Net Asset Value		1.96%		(0.31%)
Futures Contracts [Member] | Short [Member] | Agriculture [Member]
Investment Owned
Net unrealized gain (loss) on open futures contracts		$ 1,771,406		$ 1,210,948
% of Net Asset Value		0.94%		0.45%
Futures Contracts [Member] | Short [Member] | Energy [Member]
Investment Owned
Net unrealized gain (loss) on open futures contracts		$ 559,274		$ (1,004,550)
% of Net Asset Value		0.30%		(0.37%)
Futures Contracts [Member] | Short [Member] | Metals [Member]
Investment Owned
Net unrealized gain (loss) on open futures contracts		$ 2,435,221		$ (1,305,307)
% of Net Asset Value		1.30%		(0.49%)
Futures Contracts [Member] | Short [Member] | Stock Indices [Member]
Investment Owned
Net unrealized gain (loss) on open futures contracts		$ 107,927		$ (57,380)
% of Net Asset Value		0.06%		(0.02%)
Futures Contracts [Member] | Short [Member] | Short-Term Interest Rates [Member]
Investment Owned
Net unrealized gain (loss) on open futures contracts		$ (5,783)		$ 137,411
% of Net Asset Value		0.00%		0.05%
Futures Contracts [Member] | Short [Member] | Long-Term Interest Rates [Member]
Investment Owned
Net unrealized gain (loss) on open futures contracts		$ (1,201,282)		$ 182,369
% of Net Asset Value		(0.64%)		0.07%
Forward Currency Contracts [Member]
Investment Owned
Net unrealized gain (loss) on open forward currency contracts		$ 4,676,402		$ 1,551,513
% of Net Asset Value		2.50%		0.57%
Forward Currency Contracts [Member] | Long [Member]
Investment Owned
Net unrealized gain (loss) on open forward currency contracts		$ 3,835,197		$ 7,702,899
% of Net Asset Value		2.05%		2.84%
Forward Currency Contracts [Member] | Short [Member]
Investment Owned
Net unrealized gain (loss) on open forward currency contracts		$ 841,205		$ (6,151,386)
% of Net Asset Value		0.45%		(2.27%)

[1] Included in fixed income securities are U.S. Treasury Bills with a fair value of $22,932,456 deposited with the futures brokers and $7,730,616 deposited with the interbank market makers.

[2] Included in fixed income securities are U.S. Treasury Bills with a fair value of $33,898,317 deposited with the futures brokers and $20,121,686 deposited with the interbank market makers.

[3] Pledged as collateral for the trading of futures and forward positions.