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10. Results of former affiliate (Tables)
 6 Months Ended
Jun. 30, 2016
Notes to Financial Statements  
Investment In and Advances to Former Affiliate
     
    June 30,  
    2015  
Six months ended:        
Total revenues   $ 13,969,000  
Net income     495,000  
Three months ended:        
Total revenues     9,919,000  
Net income     2,014,000