CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($)	Subtotal	General Partnership	Treasury Units	Class A	Class B	Total
Balance at Dec. 31, 2015		$ (306,870)		$ (24,673,535)	$ (5,830,548)	$ (30,810,953)
Balance (in units) at Dec. 31, 2015	180,225	1,802	(54,851)	144,180	34,243	125,374
Increase (Decrease) in Partners' Capital
Distribution to Partners		$ (9,369)		$ (749,540)	$ (178,016)	$ (936,925)
Stock Buyback		(6,783)		(558,723)	(128,874)	$ (694,380)
Stock Buyback (in units)			(451)			(451)
Net income		12,308		984,611	233,845	$ 1,230,764
Balance at Mar. 31, 2016		$ (310,714)		$ (24,997,187)	$ (5,903,593)	$ (31,211,494)
Balance (in units) at Mar. 31, 2016	180,225	1,802	(55,302)	144,180	34,243	124,923
Balance at Dec. 31, 2016		$ (340,840)		$ (27,407,924)	$ (6,475,961)	$ (34,224,726)
Balance (in units) at Dec. 31, 2016	180,225	1,802	(55,816)	144,180	34,243	124,409
Increase (Decrease) in Partners' Capital
Distribution to Partners		$ (11,197)		$ (895,749)	$ (212,741)	$ (1,119,687)
Stock Buyback		(426)		(34,038)	(8,084)	$ (42,548)
Stock Buyback (in units)			(23)			(23)
Net income		18,942		1,515,387	359,904	$ 1,894,234
Balance at Mar. 31, 2017		$ (333,521)		$ (26,822,324)	$ (6,336,882)	$ (33,492,726)
Balance (in units) at Mar. 31, 2017	180,225	1,802	(55,839)	144,180	34,243	124,386