Quarterly Financial Data (Details) - USD ($)	3 Months Ended												12 Months Ended
	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 55,531,621	$ 58,018,553	$ 50,974,398	$ 51,001,654	$ 54,823,174	$ 58,671,723	$ 59,067,109	$ 58,692,502	$ 63,783,301	$ 78,383,846	$ 81,324,024	$ 77,463,813	$ 215,526,226	$ 231,254,508	$ 300,954,984
Gross Profit	6,890,645	6,301,875	2,273,697	1,432,877	2,631,235	8,795,890	5,545,088	5,628,105	14,844,764	16,043,874	18,212,259	14,420,458	16,899,094	22,600,318	63,521,355
Operating Income (Loss)	5,739,434	5,017,859	784,201	32,031	1,551,398	7,494,444	4,173,843	4,204,718	13,580,276	14,833,232	16,832,384	13,124,957	$ 11,573,525	$ 17,424,403	$ 58,370,849
Net Income (Loss) Available to Members	$ 4,518,946	$ 3,492,822	$ 699,514	$ 11,526	$ 1,199,256	$ 5,440,763	$ 3,179,639	$ 3,767,092	$ 10,951,485	$ 13,018,046	$ 14,249,413	$ 10,554,947
Earnings Per Share, Diluted	$ 147.65	$ 114.12	$ 22.86	$ 0.38	$ 39.18	$ 177.77	$ 103.89	$ 123.08	$ 357.82	$ 425.34	$ 465.58	$ 344.87	$ 285.00	$ 443.92	$ 1,593.61