CONSOLIDATED STATEMENTS OF CHANGES IN PARTNER'S CAPITAL - USD ($)	3 Months Ended		9 Months Ended		169 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021
Increase (Decrease) in Partners' Capital
Balance			$ (41,469,045)	$ (37,823,787)
Balance (in units)			121,756	121,978
Distribution to Partners			$ (3,506,581)	$ (3,506,894)
Stock Buyback				$ (394,031)	$ (44,718,000)
Stock Buyback (in units)				(222)
Net income	$ (75,385)	$ (439,284)	200,326	$ 2,394,551
Balance	$ (44,775,300)	$ (39,330,161)	$ (44,775,300)	$ (39,330,161)	$ (44,775,300)
Balance (in units)	121,756	121,756	121,756	121,756	121,756
Subtotal
Increase (Decrease) in Partners' Capital
Balance (in units)			180,225	180,225
Balance (in units)	180,225	180,225	180,225	180,225	180,225
General Partnership
Increase (Decrease) in Partners' Capital
Balance			$ (413,280)	$ (376,827)
Balance (in units)			1,802	1,802
Distribution to Partners			$ (35,065)	$ (35,069)
Stock Buyback				(3,941)
Net income			2,003	23,946
Balance	$ (446,342)	$ (391,891)	$ (446,342)	$ (391,891)	$ (446,342)
Balance (in units)	1,802	1,802	1,802	1,802	1,802
Treasury Units
Increase (Decrease) in Partners' Capital
Balance (in units)			(58,469)	(58,247)
Stock Buyback (in units)				(222)
Balance (in units)	(58,469)	(58,469)	(58,469)	(58,469)	(58,469)
Class A
Increase (Decrease) in Partners' Capital
Balance			$ (33,203,447)	$ (30,287,245)
Balance (in units)			144,180	144,180
Distribution to Partners			$ (2,805,265)	$ (2,805,515)
Stock Buyback				(315,220)
Net income			160,261	1,915,640
Balance	$ (35,848,451)	$ (31,492,340)	$ (35,848,451)	$ (31,492,340)	$ (35,848,451)
Balance (in units)	144,180	144,180	144,180	144,180	144,180
Class B
Increase (Decrease) in Partners' Capital
Balance			$ (7,852,318)	$ (7,159,715)
Balance (in units)			34,243	34,243
Distribution to Partners			$ (666,251)	$ (666,310)
Stock Buyback				(74,870)
Net income			38,062	454,965
Balance	$ (8,480,507)	$ (7,445,930)	$ (8,480,507)	$ (7,445,930)	$ (8,480,507)
Balance (in units)	34,243	34,243	34,243	34,243	34,243