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7. Credit Agreements, Notes Payable, Subordinated and Convertible Debentures Payable (Tables)
9 Months Ended
Sep. 30, 2017
Credit Agreements Notes Payable Subordinated And Convertible Debentures Payable  
Credit agreements with the Company
    September 30,     December 31,  
    2017     2016  
    ($ in thousands)  
Notes payable - $1,176,000 bearing            
  interest at prime plus 2%,            
  the remainder non-interest bearing,            
  all past due   $ 1,198     $ 1,198  
                 
Subordinated convertible debentures payable:                
  At 6-1/2% interest; due June 1, 1991     447       447  
  At 6% interest; due May 1, 1992     8,025       8,025  
      8,472       8,472  
    $ 9,670     $ 9,670