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Shareholders' Equity and Other Comprehensive Income (Tables)
 3 Months Ended
Mar. 31, 2018
Notes to Financial Statements  
Stockholders' Equity and Accumulated Other Comprehensive Income
(in thousands, except         Accumulated  
Share amounts) Common Common Additional   Other Total
  Stock Stock Paid-in Accumulated Comprehensive Shareholders’
  Shares Amount Capital Deficit Income Equity
Balance at December 31, 2017 58,434,566 584  $69,312  $(40,343) $   576  $30,129 

Cumulative-effect adjustment

change in accounting principle

 -    -    -    576  (576) -  
Adjusted balance January 1, 2018 58,434,566 584 69,312  (39,767) -    30,129 
Stock option expense -    -    10  -    -    10 
Purchase of shares for cancellation (52,614) -    (26) -    -    (26)
Net loss -    -    -    (1,004) -    (1,004)
Balance at March 31, 2017 58,381,952 $584 $69,296  $(40,771) $    -      $29,109