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Shareholders Equity (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Sep. 30, 2016
Common Stock        
Beginning balance, value $ 388 $ 390 $ 392 $ 392
Beginning balance, shares 38,763,189 38,995,189 39,169,189 39,169,189
Stock option expense  
Purchase of shares for cancellation, value $ (1) $ (2) $ (2)  
Purchase of shares for cancellation, shares (18,000) (232,000) (174,000)  
Net loss  
Net unrealized gain on marketable equity securities  
Ending balance, value $ 387 $ 388 $ 390 $ 387
Ending balance, shares 38,745,189 38,763,189 38,995,189 38,745,189
Additional Paid-In Capital        
Beginning balance, value $ 54,897 $ 54,984 $ 55,063 $ 55,063
Stock option expense 939 29 2  
Purchase of shares for cancellation, value (12) (116) (81)  
Net loss  
Net unrealized gain on marketable equity securities  
Ending balance, value 55,824 54,897 54,984 55,824
Retained Earnings / Accumulated Deficit        
Beginning balance, value (38,342) (38,180) (37,691) (37,691)
Stock option expense  
Purchase of shares for cancellation, value  
Net loss (1,119) (162) (489)  
Net unrealized gain on marketable equity securities  
Ending balance, value (39,461) (38,342) (38,180) (39,461)
Other Comprehensive Income / Loss        
Beginning balance, value 514 218 111 111
Stock option expense  
Purchase of shares for cancellation, value  
Net loss  
Net unrealized gain on marketable equity securities 46 296 107  
Ending balance, value 560 514 218 560
Beginning balance, value 17,457 17,412 17,875 $ 17,875
Stock option expense 939 29 2  
Purchase of shares for cancellation, value (13) (118) (83)  
Purchase of shares for cancellation, shares       424,000
Net loss (1,119) (162) (489)  
Net unrealized gain on marketable equity securities 46 296 107  
Ending balance, value $ 17,310 $ 17,457 $ 17,412 $ 17,310