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Notes and Short-term Receivables
3 Months Ended
Mar. 31, 2014
Receivables [Abstract]  
Notes and Short-term Receivables
5. Notes and Short-term Receivables
 
At March 31, 2014 and December 31, 2013, notes and short-term receivables, including accrued interest, consisted of:
 
   
2014
   
2013
 
Note receivable - Vulcan
  $ 450,000     $ 440,000  
                 
   Total notes and short-term receivables
  $ 450,000     $ 440,000