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Condensed Statements of Changes in Partners' Capital (USD $) | Total | General Partner [Member] | Limited Partner [Member]
--- | --- | --- | ---
Balances at Dec. 31, 2012 | $ 43,085,691 | $ 0 | $ 43,085,691
Net asset value, beginning of period at Dec. 31, 2012 | $ 17.23 |  |
Addition of 200,000 partnership units | 3,480,456 | 0 | 3,480,456
Redemption of 1,200,000 partnership units | (22,880,541) | 0 | (22,880,541)
Net income | 2,122,933 | 0 | 2,122,933
Balances at Jun. 30, 2013 | $ 25,808,539 | $ 0 | $ 25,808,539
Net asset value, end of period at Jun. 30, 2013 | $ 17.21 |  |

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