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CONSOLIDATED STATEMENTS OF CHANGES IN PARTNER'S CAPITAL - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Increase (Decrease) in Partners' Capital |  |  |  |
Balance |  |  | $ (35,315,177) | $ (34,224,725)
Balance (in units) |  |  | 124,386 | 124,409
Distribution to Partners |  |  | $ (3,358,443) | $ (3,358,648)
Stock Buyback |  |  |  | (42,548)
Stock Buyback (in units) |  |  | (23) |
Net income | $ 660,329 | $ 871,720 | $ 2,592,212 | 5,249,663
Balance | $ (36,081,408) | $ (32,376,258) | $ (36,081,408) | $ (32,376,258)
Balance (in units) | 124,386 | 124,386 | 124,386 | 124,386
Subtotal |  |  |  |
Increase (Decrease) in Partners' Capital |  |  |  |
Balance (in units) |  |  | 180,225 | 180,225
Balance (in units) | 180,225 | 180,225 | 180,225 | 180,225
General Partnership |  |  |  |
Increase (Decrease) in Partners' Capital |  |  |  |
Balance |  |  | $ (351,745) | $ (340,840)
Balance (in units) |  |  | 1,802 | 1,802
Distribution to Partners |  |  | $ (33,584) | $ (33,586)
Stock Buyback |  |  |  | (426)
Net income |  |  | 25,922 | 52,497
Balance | $ (359,407) | $ (322,355) | $ (359,407) | $ (322,355)
Balance (in units) | 1,802 | 1,802 | 1,802 | 1,802
Treasury Units |  |  |  |
Increase (Decrease) in Partners' Capital |  |  |  |
Balance (in units) |  |  | (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 |  |  | $ (28,280,285) | $ (27,407,924)
Balance (in units) |  |  | 144,180 | 144,180
Distribution to Partners |  |  | $ (2,686,755) | $ (2,686,919)
Stock Buyback |  |  |  | (34,038)
Net income |  |  | 2,073,770 | 4,199,730
Balance | $ (28,893,270) | $ (25,929,151) | $ (28,893,270) | $ (25,929,151)
Balance (in units) | 144,180 | 144,180 | 144,180 | 144,180
Class B |  |  |  |
Increase (Decrease) in Partners' Capital |  |  |  |
Balance |  |  | $ (6,683,147) | $ (6,475,961)
Balance (in units) |  |  | 34,243 | 34,243
Distribution to Partners |  |  | $ (638,104) | $ (638,143)
Stock Buyback |  |  |  | (8,084)
Net income |  |  | 492,520 | 997,436
Balance | $ (6,828,731) | $ (6,124,752) | $ (6,828,731) | $ (6,124,752)
Balance (in units) | 34,243 | 34,243 | 34,243 | 34,243

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