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6. Credit Agreements, Notes Payable, Subordinated and Convertible Debentures Payable (Tables)
3 Months Ended
Mar. 31, 2021
Debt Disclosure [Abstract]  
Credit agreements with the Company
    March 31,     December 31,  
    2021     2020  
    ($ 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% interest; due May 1992     8,025       8,025  
      8,025       8,025  
    $ 9,223     $ 9,223