XML 36 R56.htm IDEA: XBRL DOCUMENT v2.4.1.9
Income Per Share and Per Unit - Computation of Basic and Diluted Earnings Per Unit (Detail) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Earnings Per Share [Abstract]    
Net income $ 713,859us-gaap_ProfitLoss $ 1,002,314us-gaap_ProfitLoss
Weighted average number of units outstanding 13,146,628us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding 13,089,837us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding
Basic and diluted net income per unit $ 0.05us-gaap_EarningsPerShareBasicAndDiluted $ 0.08us-gaap_EarningsPerShareBasicAndDiluted