Consolidated Statements of Changes in Members' Capital (Unaudited) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Members' capital, beginning balance	$ 27,270,731	$ 27,677,400	$ 27,344,100	$ 27,654,894	$ 27,020,001	$ 27,978,759	$ 27,344,100	$ 27,978,759
Subscriptions	0	0	0	0	50,000	323,500
Redemptions	(226,123)	(428,802)	(970,453)	(1,453,795)	(1,094,231)	(1,257,799)
Net income (loss)	1,482,746	22,133	1,303,753	1,836,813	1,679,124	(24,459)	2,808,632	3,491,478
Members' capital, ending balance	28,527,354	27,270,731	27,677,400	28,037,912	27,654,894	27,020,001	28,527,354	28,037,912
Class 0 Units [Member]
Members' capital, beginning balance	$ 16,722,873	$ 16,917,644	$ 16,605,529	$ 17,008,343	$ 16,486,750	$ 16,801,362	$ 16,605,529	$ 16,801,362
Members' capital, beginning balance (in units)	104,817.807	106,189.149	109,215.865	119,596.205	123,312.164	125,660.811	109,215.865	125,660.811
Subscriptions	$ 0	$ 0	$ 0	$ 0	$ 50,000	$ 250,000
Subscriptions (in units)	0	0	0	0	373.974	1,882.369
Redemptions	$ 0	$ (218,495)	$ (461,116)	$ (1,249,411)	$ (571,538)	$ (563,529)
Redemptions (in units)	0	(1,371.342)	(3,026.716)	(8,263.487)	(4,089.933)	(4,231.016)
Net income (loss)	$ 854,497	$ 23,724	$ 773,231	$ 1,141,552	$ 1,043,131	$ (1,083)
Members' capital, ending balance	$ 17,577,370	$ 16,722,873	$ 16,917,644	$ 16,900,484	$ 17,008,343	$ 16,486,750	$ 17,577,370	$ 16,900,484
Members' capital, ending balance (in units)	104,817.807	104,817.807	106,189.149	111,332.718	119,596.205	123,312.164	104,817.807	111,332.718
Class 2 Units [Member]
Members' capital, beginning balance	$ 10,547,858	$ 10,759,756	$ 10,738,571	$ 10,646,551	$ 10,533,251	$ 11,177,397	$ 10,738,571	$ 11,177,397
Members' capital, beginning balance (in units)	92,702.264	94,555.617	99,110.353	104,648.093	109,922.506	116,424.562	99,110.353	116,424.562
Subscriptions	$ 0	$ 0	$ 0	$ 0	$ 0	$ 73,500
Subscriptions (in units)	0	0	0	0	0	775.525
Redemptions	$ (226,123)	$ (210,307)	$ (509,337)	$ (204,384)	$ (522,693)	$ (694,270)
Redemptions (in units)	(1,876.104)	(1,853.353)	(4,554.736)	(1,887.756)	(5,274.413)	(7,277.581)
Net income (loss)	$ 628,249	$ (1,591)	$ 530,522	$ 695,261	$ 635,993	$ (23,376)
Members' capital, ending balance	$ 10,949,984	$ 10,547,858	$ 10,759,756	$ 11,137,428	$ 10,646,551	$ 10,533,251	$ 10,949,984	$ 11,137,428
Members' capital, ending balance (in units)	90,826.160	92,702.264	94,555.617	102,760.337	104,648.093	109,922.506	90,826.160	102,760.337