XML 46 R35.htm IDEA: XBRL DOCUMENT v3.5.0.2
Equity Method Investment (Details) - USD ($)
9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Equity Method Investment (Textual)    
Ownership interest percentage in crawford county gas gathering company, LLC 50.00%  
Equity investment income (loss) in crawford county gas gathering company, LLC $ (10,000) $ 6,000
Received cash distribution $ 275,000