QUARTERLY FINANCIAL DATA (UNAUDITED) (Details)	3 Months Ended								12 Months Ended
	Dec. 31, 2023 USD ($) $ / shares $ / item	Sep. 30, 2023 USD ($) $ / shares $ / item	Jun. 30, 2023 USD ($) $ / shares $ / item	Mar. 31, 2023 USD ($) $ / shares $ / item	Dec. 31, 2022 USD ($) $ / shares $ / item	Sep. 30, 2022 USD ($) $ / shares $ / item	Jun. 30, 2022 USD ($) $ / shares $ / item	Mar. 31, 2022 USD ($) $ / shares $ / item	Dec. 31, 2023 USD ($) $ / shares $ / item	Dec. 31, 2022 USD ($) $ / shares $ / item	Dec. 31, 2021 USD ($) $ / shares
QUARTERLY FINANCIAL DATA (UNAUDITED)
Revenue	$ 19,727,004	$ 18,961,642	$ 18,101,036	$ 17,691,686	$ 17,703,006	$ 17,078,383	$ 16,931,928	$ 16,580,409	$ 74,481,368	$ 68,293,726	$ 62,638,454
Expenses	15,001,133	14,062,381	13,362,686	13,240,321	12,563,529	12,517,586	12,321,006	12,803,459	55,666,521	50,205,580
Income Before Other Income (Expense)	4,725,871	4,899,261	4,738,350	4,451,365	5,139,477	4,560,797	4,610,922	3,776,950	18,814,847	18,088,146	14,242,500
Other Expenses	(2,426,126)	(2,724,035)	(2,513,746)	(2,696,990)	(2,996,831)	(3,565,573)	(4,367,937)	(3,434,532)	(10,360,897)	(14,364,873)	(16,942,663)
Net Income (Loss)	$ 2,299,745	$ 2,175,226	$ 2,224,604	$ 1,754,375	$ 2,142,646	$ 995,224	$ 242,985	$ 342,418	$ 8,453,950	$ 3,723,273	$ (2,700,163)
Net Income (loss) per Unit (in dollars per unit) | $ / shares	$ 19.51	$ 18.38	$ 18.73	$ 14.72	$ 17.83	$ 8.32	$ 2.02	$ 2.82	$ 71.34	$ 30.99	$ (22.19)
Net Income (loss) per Depositary Receipt (in dollars per receipt) | $ / item	0.65	0.61	0.62	0.49	0.59	0.28	0.07	0.09	2.38	1.03