XML 16 R25.htm IDEA: XBRL DOCUMENT v3.3.0.814
Fair value measurements (Details 1) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Fair Value Inputs, Equity, Quantitative Information [Line Items]            
Balance, Beginning     $ 5,208,603   $ 5,208,603  
Profit sharing and equity from earnings of OC-BVI         288,067  
Distributions received from OC-BVI         0  
Impairment of investment in OC-BVI (See Note 6) $ 225,000 $ 275,000 $ 310,000 $ 0 810,000 $ 0
Balance, Ending $ 4,686,670       $ 4,686,670