QUARTERLY FINANCIAL DATA (UNAUDITED) (Details)	3 Months Ended								12 Months Ended
	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, 2021 USD ($) $ / shares $ / item	Sep. 30, 2021 USD ($) $ / shares $ / item	Jun. 30, 2021 USD ($) $ / shares $ / item	Mar. 31, 2021 USD ($) $ / shares $ / item	Dec. 31, 2022 USD ($) $ / shares $ / item	Dec. 31, 2021 USD ($) $ / shares $ / item	Dec. 31, 2020 USD ($) $ / shares
QUARTERLY FINANCIAL DATA (UNAUDITED)
Revenue	$ 17,703,006	$ 17,078,383	$ 16,931,928	$ 16,580,409	$ 16,155,649	$ 15,946,672	$ 15,447,344	$ 15,088,789	$ 68,293,726	$ 62,638,454	$ 62,102,710
Expenses	12,563,529	12,517,586	12,321,006	12,803,459	13,046,756	12,395,436	11,260,112	11,693,650	50,205,580	48,395,954
Income Before Other Income (Expense)	5,139,477	4,560,797	4,610,922	3,776,950	3,108,893	3,551,236	4,187,232	3,395,139	18,088,146	14,242,500	14,969,033
Other Expenses	(2,996,831)	(3,565,573)	(4,367,937)	(3,434,532)	(6,009,382)	(3,626,621)	(3,617,341)	(3,689,319)	(14,364,873)	(16,942,663)	(13,544,505)
Net (Loss) Income	$ 2,142,646	$ 995,224	$ 242,985	$ 342,418	$ (2,900,489)	$ (75,385)	$ 569,891	$ (294,180)	$ 3,723,273	$ (2,700,163)	$ 1,424,528
Net Income (loss) per Unit (in dollars per unit) | $ / shares	$ 17.83	$ 8.32	$ 2.02	$ 2.82	$ (23.83)	$ (0.62)	$ 4.68	$ (2.42)	$ 30.99	$ (22.19)	$ 11.70
Net Income (loss) per Depositary Receipt (in dollars per receipt) | $ / item	0.59	0.28	0.07	0.09	(0.79)	(0.02)	0.16	(0.08)	1.03	(0.74)