CONSOLIDATED STATEMENTS OF CHANGES IN PARTNER'S CAPITAL - USD ($)	3 Months Ended				12 Months Ended			184 Months Ended
	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
Increase (Decrease) in Partners' Capital
Balance		$ (49,292,607)		$ (41,469,045)	$ (49,292,607)	$ (41,469,045)	$ (37,823,788)
Balance (in units)		121,516		121,756	121,516	121,756	121,978
Distribution to Partners					$ (9,267,981)	$ (4,673,140)	$ (4,675,754)
Stock Buyback					$ (5,326,973)	$ (450,258)	$ (394,031)	$ (50,495,000)
Stock Buyback (in units)					(2,261)	(240)	(222)
Net income (loss)	$ 2,142,646	$ 342,418	$ (2,900,489)	$ (294,180)	$ 3,723,273	$ (2,700,163)	$ 1,424,528
Net unrealized gain (loss) on derivative instruments for interest rate swaps					294,931	0	0
Balance	$ (59,869,357)		$ (49,292,607)		$ (59,869,357)	$ (49,292,607)	$ (41,469,045)	$ (59,869,357)
Balance (in units)	119,255		121,516		119,255	121,516	121,756	119,255
Accumulated Comprehensive
Increase (Decrease) in Partners' Capital
Net unrealized gain (loss) on derivative instruments for interest rate swaps					$ 294,931
Balance	$ 294,931				$ 294,931			$ 294,931
Subtotal
Increase (Decrease) in Partners' Capital
Balance (in units)		180,225		180,225	180,225	180,225	180,225
Balance (in units)	180,225		180,225		180,225	180,225	180,225	180,225
General Partnership
Increase (Decrease) in Partners' Capital
Balance		$ (491,512)		$ (413,280)	$ (491,512)	$ (413,280)	$ (376,827)
Balance (in units)		1,802		1,802	1,802	1,802	1,802
Distribution to Partners					$ (92,680)	$ (46,731)	$ (46,757)
Stock Buyback					$ (53,232)	(4,500)	(3,941)
Stock Buyback (in units)					(22.61)
Net income (loss)					$ 37,233	(27,002)	14,245
Balance	$ (600,191)		$ (491,512)		$ (600,191)	$ (491,512)	$ (413,280)	$ (600,191)
Balance (in units)	1,802		1,802		1,802	1,802	1,802	1,802
Treasury Units
Increase (Decrease) in Partners' Capital
Balance (in units)		58,709		58,469	58,709	58,469	58,247
Stock Buyback (in units)					(2,261)	(240)	(222)
Balance (in units)	60,970		58,709		60,970	58,709	58,469	60,970
Class A
Increase (Decrease) in Partners' Capital
Balance		$ (39,462,357)		$ (33,203,447)	$ (39,462,357)	$ (33,203,447)	$ (30,287,245)
Balance (in units)		144,180		144,180	144,180	144,180	144,180
Distribution to Partners					$ (7,414,385)	$ (3,738,512)	$ (3,740,604)
Stock Buyback					(4,262,338)	(360,266)	(315,220)
Net income (loss)					2,978,619	(2,160,131)	1,139,622
Balance	$ (48,160,462)		$ (39,462,357)		$ (48,160,462)	$ (39,462,357)	$ (33,203,447)	$ (48,160,462)
Balance (in units)	144,180		144,180		144,180	144,180	144,180	144,180
Class B
Increase (Decrease) in Partners' Capital
Balance		$ (9,338,738)		$ (7,852,318)	$ (9,338,738)	$ (7,852,318)	$ (7,159,715)
Balance (in units)		34,243		34,243	34,243	34,243	34,243
Distribution to Partners					$ (1,760,916)	$ (887,897)	$ (888,393)
Stock Buyback					$ (1,011,403)	(85,492)	(74,870)
Stock Buyback (in units)					(429.65)
Net income (loss)					$ 707,421	(513,031)	270,660
Balance	$ (11,403,635)		$ (9,338,738)		$ (11,403,635)	$ (9,338,738)	$ (7,852,318)	$ (11,403,635)
Balance (in units)	34,243		34,243		34,243	34,243	34,243	34,243