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Uncategorized Items
12/31/2009
USD ($)
[us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations]
 20,213,413  
[us-gaap_PartnersCapitalAccountUnits]
   60,252,928
/ us-gaap_PartnerCapitalComponentsAxis
= us-gaap_CapitalUnitsMember