CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($)	Subtotal	General Partnership	Treasury Units	Class A	Class B	Total
Balance at Dec. 31, 2014		$ (272,859)		$ (21,910,488)	$ (5,184,335)	$ (27,367,682)
Balance (in units) at Dec. 31, 2014	180,225	1,802	52,572	144,180	34,243	127,653
Increase (Decrease) in Partners' Capital
Distribution to Partners		$ (18,999)		$ (1,519,908)	$ (360,978)	$ (1,899,885)
Stock Buyback		(18,668)		(1,505,645)	(354,688)	(1,879,001)
Stock Buyback (in units)			1,253
Net income		15,061		1,204,893	286,162	1,506,116
Balance at Jun. 30, 2015		$ (295,465)		$ (23,731,148)	$ (5,613,839)	$ (29,640,452)
Balance (in units) at Jun. 30, 2015	180,225	1,802	53,825	144,180	34,243	126,400
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		$ (18,738)		$ (1,499,080)	$ (356,032)	$ (1,873,850)
Stock Buyback		$ (6,783)	$ 451	(558,723)	$ (128,874)	(694,380)
Stock Buyback (in units)		5			86
Net income		$ 22,113		1,769,081	$ 420,157	2,211,351
Balance at Jun. 30, 2016		$ (310,278)		$ (24,962,257)	$ (5,895,297)	$ (31,167,832)
Balance (in units) at Jun. 30, 2016	180,225	1,802	55,302	144,180	34,243	124,923