CONSOLIDATED STATEMENTS OF CHANGES IN PARTNER'S CAPITAL - USD ($)	3 Months Ended		6 Months Ended		130 Months Ended
	Sep. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018
Increase (Decrease) in Partners' Capital
Balance	$ (35,622,256)		$ (35,315,177)	$ (34,224,726)
Balance (in units)	124,386		124,386	124,409
Distribution to Partners			$ (2,238,962)	$ (2,239,168)
Stock Buyback				$ (42,548)	$ (40,274,000)
Stock Buyback (in units)				(23)
Net income	$ 53,326	$ 2,483,707	1,931,883	$ 4,377,941
Balance		$ (32,128,500)	$ (35,622,256)	$ (32,128,500)	$ (35,622,256)
Balance (in units)		124,386	124,386	124,386	124,386
Subtotal
Increase (Decrease) in Partners' Capital
Balance (in units)	180,225		180,225	180,225
Balance (in units)		180,225	180,225	180,225	180,225
General Partnership
Increase (Decrease) in Partners' Capital
Balance	$ (354,816)		$ (351,745)	$ (340,840)
Balance (in units)	1,802		1,802	1,802
Distribution to Partners			$ (22,390)	$ (22,392)
Stock Buyback				(426)
Net income			19,319	43,779
Balance		$ (319,879)	$ (354,816)	$ (319,879)	$ (354,816)
Balance (in units)		1,802	1,802	1,802	1,802
Treasury Units
Increase (Decrease) in Partners' Capital
Balance (in units)	(55,839)		(55,839)	(55,816)
Stock Buyback (in units)				(23)
Balance (in units)		(55,839)	(55,839)	(55,839)	(55,839)
Class A
Increase (Decrease) in Partners' Capital
Balance	$ (28,525,948)		$ (28,280,285)	$ (27,407,924)
Balance (in units)	144,180		144,180	144,180
Distribution to Partners			$ (1,791,169)	$ (1,791,334)
Stock Buyback				(34,038)
Net income			1,545,506	3,502,353
Balance		$ (25,730,943)	$ (28,525,948)	$ (25,730,943)	$ (28,525,948)
Balance (in units)		144,180	144,180	144,180	144,180
Class B
Increase (Decrease) in Partners' Capital
Balance	$ (6,741,492)		$ (6,683,147)	$ (6,475,961)
Balance (in units)	34,243		34,243	34,243
Distribution to Partners			$ (425,403)	$ (425,442)
Stock Buyback				(8,084)
Net income			367,058	831,809
Balance		$ (6,077,678)	$ (6,741,492)	$ (6,077,678)	$ (6,741,492)
Balance (in units)		34,243	34,243	34,243	34,243